<PAGE>

                                                                    Exhibit 10.4

                               iROBOT CORPORATION

            AMENDED AND RESTATED 2004 STOCK OPTION AND INCENTIVE PLAN

1. Purpose and Eligibility

      The purpose of this Amended and Restated 2004 Stock Option and Incentive
Plan (the "Plan") of iRobot Corporation (the "Company") is to amend and restate
in its entirety the Company's 2004 Stock Option and Incentive Plan (as
originally adopted and approved, the "Original Plan") and to provide stock
options and other equity interests in the Company (each an "Award") to
employees, officers, directors, consultants and advisors of the Company and its
Subsidiaries, all of whom are eligible to receive Awards under the Plan. Any
person to whom an Award has been granted under the Plan is called a
"Participant." Additional definitions are contained in Section 8.

2. Administration

      a. Administration by Board of Directors. The Plan will be administered by
the Board of Directors of the Company (the "Board"). The Board, in its sole
discretion, shall have the authority to grant and amend Awards, to adopt, amend
and repeal rules relating to the Plan and to interpret and correct the
provisions of the Plan and any Award. All decisions by the Board shall be final
and binding on all interested persons. Neither the Company nor any member of the
Board shall be liable for any action or determination relating to the Plan.

      b. Appointment of Committees. To the extent permitted by applicable law,
the Board may delegate any or all of its powers under the Plan to one or more
committees or subcommittees of the Board (a "Committee"). All references in the
Plan to the "Board" shall mean such Committee or the Board.

      c. Delegation to Executive Officers. To the extent permitted by applicable
law, the Board may delegate to one or more executive officers of the Company the
power to grant Awards and exercise such other powers under the Plan as the Board
may determine, provided that the Board shall fix the maximum number of Awards to
be granted and the maximum number of shares issuable to any one Participant
pursuant to Awards granted by such executive officers.

3. Stock Available for Awards

      a. Number of Shares. Subject to adjustment under Section 3(c), the
aggregate number of shares of Common Stock of the Company, par value $.01 per
share (the "Common Stock") that may be issued pursuant to the Plan is (i)
1,189,423 shares plus (ii) such number of shares as equals that number of stock
options returned to the Company's Amended and Restated 1994 Stock Plan, as
amended, in accordance there with, after November 16, 2004, as a result of the
expiration, cancellation or termination; provided, however, that such aggregate
number of shares that may be issued pursuant to the Plan shall not exceed
3,695,223 shares. If any Award expires, or is terminated, surrendered, cancelled
or forfeited, in whole or in part, the unissued

<PAGE>

Common Stock covered by such Award shall again be available for the grant of
Awards under the Plan. If shares of Common Stock issued pursuant to the Plan are
repurchased by, or are surrendered or forfeited to, the Company at no more than
cost, such shares of Common Stock shall again be available for the grant of
Awards under the Plan; provided, however, that the cumulative number of such
shares that may be so reissued, together with all other shares that may be
issued, under the Plan will not exceed 3,695,223 shares. Shares issued under the
Plan may consist in whole or in part of authorized but unissued shares or
treasury shares.

      b. Per-Participant Limit. Subject to adjustment under Section 3(c), no
Participant may be granted Awards during any one fiscal year to purchase more
than 2,586,656 shares of Common Stock.

      c. Adjustment to Common Stock. In the event of any stock split, stock
dividend, extraordinary cash dividend, recapitalization, reorganization, merger,
consolidation, combination, exchange of shares, liquidation, spin-off, split-up,
or other similar change in capitalization or event, (i) the number and class of
securities available for Awards under the Plan and the per-Participant share
limit, (ii) the number and class of securities, vesting schedule and exercise
price per share subject to each outstanding Option, (iii) the repurchase price
per security subject to repurchase, and (iv) the terms of each other outstanding
stock-based Award shall be adjusted by the Company in an equitable or
proportionate manner determined by the Board to avoid distortion in the value of
the Awards. If Section 7(e)(i) applies for any event, this Section 3(c) shall
not be applicable. The adjustments by the Board shall be final, binding and
conclusive.

4. Stock Options

      a. General. The Board may grant options to purchase Common Stock (each, an
"Option") and determine the number of shares of Common Stock to be covered by
each Option, the exercise price of each Option and the conditions and
limitations applicable to the exercise of each Option and the Common Stock
issued upon the exercise of each Option, including vesting provisions,
repurchase provisions and restrictions relating to applicable federal or state
securities laws, as it considers advisable.

      b. Incentive Stock Options. An Option that the Board intends to be an
"incentive stock option" as defined in Section 422 of the Code (an "Incentive
Stock Option") shall be granted only to employees of the Company and shall be
subject to and shall be construed consistently with the requirements of Section
422 of the Code. The Board and the Company shall have no liability if an Option
or any part thereof that is intended to be an Incentive Stock Option does not
qualify as such. An Option or any part thereof that does not qualify as an
Incentive Stock Option is referred to herein as a "Nonstatutory Stock Option".

      c. Exercise Price. The Board shall establish the exercise price (or
determine the method by which the exercise price shall be determined) at the
time each Option is granted and specify it in the applicable option agreement.

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 2 -
<PAGE>

      d. Duration of Options. Each Option shall be exercisable at such times and
subject to such terms and conditions as the Board may specify in the applicable
option agreement.

      e. Exercise of Option. Options may be exercised only by delivery to the
Company of a written notice of exercise signed by the proper person together
with payment in full as specified in Section 4(f) for the number of shares for
which the Option is exercised.

      f. Payment Upon Exercise. Common Stock purchased upon the exercise of an
Option shall be paid for by one or any combination of the following forms of
payment:

            (i) by cash or check payable to the order of the Company;

            (ii) except as otherwise explicitly provided in the applicable
option agreement, and only if the Common Stock is then publicly traded, delivery
of an irrevocable and unconditional undertaking by a creditworthy broker to
deliver promptly to the Company sufficient funds to pay the exercise price, or
delivery by the Participant to the Company of a copy of irrevocable and
unconditional instructions to a creditworthy broker to deliver promptly to the
Company cash or a check sufficient to pay the exercise price; or

            (iii) to the extent explicitly provided in the applicable option
agreement, by (x) delivery of shares of Common Stock owned by the Participant
valued at fair market value (as determined by the Board or as determined
pursuant to the applicable option agreement), (y) delivery of a promissory note
of the Participant to the Company (and delivery to the Company by the
Participant of a check in an amount equal to the par value of the shares
purchased), or (z) payment of such other lawful consideration as the Board may
determine.

5. Restricted Stock

      a. Grants. The Board may grant Awards entitling recipients to acquire
shares of Common Stock, subject to (i) delivery to the Company by the
Participant of cash or other lawful consideration in an amount at least equal to
the par value of the shares purchased, and (ii) the right of the Company to
repurchase all or part of such shares at their issue price or other stated or
formula price from the Participant in the event that conditions specified by the
Board in the applicable Award are not satisfied prior to the end of the
applicable restriction period or periods established by the Board for such Award
(each, a "Restricted Stock Award").

      b. Terms and Conditions. The Board shall determine the terms and
conditions of any such Restricted Stock Award. Any stock certificates issued in
respect of a Restricted Stock Award shall be registered in the name of the
Participant and, unless otherwise determined by the Board, deposited by the
Participant, together with a stock power endorsed in blank, with the Company (or
its designee). After the expiration of the applicable restriction periods, the
Company (or such designee) shall deliver the certificates no longer subject to
such restrictions to the Participant or, if the Participant has died, to the
beneficiary designated by a Participant, in a manner determined by the Board, to
receive amounts due or exercise rights of the Participant in the event of the
Participant's death (the "Designated Beneficiary"). In the absence of an
effective designation by a Participant, Designated Beneficiary shall mean the
Participant's estate.

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 3 -
<PAGE>

6. Other Stock-Based Awards

      The Board shall have the right to grant other Awards based upon the Common
Stock having such terms and conditions as the Board may determine, including,
without limitation, the grant of shares based upon certain conditions, the grant
of securities convertible into Common Stock and the grant of stock appreciation
rights, phantom stock awards or stock units.

7. General Provisions Applicable to Awards

      a. Transferability of Awards. Except as the Board may otherwise determine
or provide in an Award, Awards shall not be sold, assigned, transferred, pledged
or otherwise encumbered by the person to whom they are granted, either
voluntarily or by operation of law, except by will or the laws of descent and
distribution, and, during the life of the Participant, shall be exercisable only
by the Participant. References to a Participant, to the extent relevant in the
context, shall include references to authorized transferees.

      b. Documentation. Each Award under the Plan shall be evidenced by a
written instrument in such form as the Board shall determine or as executed by
an officer of the Company pursuant to authority delegated by the Board. Each
Award may contain terms and conditions in addition to those set forth in the
Plan provided that such terms and conditions do not contravene the provisions of
the Plan.

      c. Board Discretion. The terms of each type of Award need not be
identical, and the Board need not treat Participants uniformly.

      d. Termination of Status. The Board shall determine the effect on an Award
of the disability, death, retirement, authorized leave of absence or other
change in the employment or other status of a Participant and the extent to
which, and the period during which, the Participant, or the Participant's legal
representative, conservator, guardian or Designated Beneficiary, may exercise
rights under the Award.

      e. Acquisition of the Company

            (i) Consequences of an Acquisition. Upon the consummation of an
Acquisition, the Board or the board of directors of the surviving or acquiring
entity (as used in this Section 7(e)(i), also the "Board"), shall, as to
outstanding Awards (on the same basis or on different bases as the Board shall
specify), make appropriate provision for the continuation of such Awards by the
Company or the assumption of such Awards by the surviving or acquiring entity
and by substituting on an equitable basis for the shares then subject to such
Awards either (a) the consideration payable with respect to the outstanding
shares of Common Stock in connection with the Acquisition, (b) shares of stock
of the surviving or acquiring corporation or (c) such other securities or other
consideration as the Board deems appropriate, the fair market value of which (as
determined by the Board in its sole discretion) shall not materially differ from
the fair market value of the shares of Common Stock subject to such Awards
immediately preceding the Acquisition. In addition to or in lieu of the
foregoing, with respect to outstanding

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 4 -
<PAGE>

Options, the Board may, on the same basis or on different bases as the Board
shall specify, upon written notice to the affected optionees, provide that one
or more Options then outstanding must be exercised, in whole or in part, within
a specified number of days of the date of such notice, at the end of which
period such Options shall terminate, or provide that one or more Options then
outstanding, in whole or in part, shall be terminated in exchange for a cash
payment equal to the excess of the fair market value (as determined by the Board
in its sole discretion) for the shares subject to such Options over the exercise
price thereof; provided, however, that before terminating any portion of an
Option that is not vested or exercisable (other than in exchange for a cash
payment), the Board must first accelerate in full the exercisability of the
portion that is to be terminated. Unless otherwise determined by the Board (on
the same basis or on different bases as the Board shall specify), any repurchase
rights or other rights of the Company that relate to an Option or other Award
shall continue to apply to consideration, including cash, that has been
substituted, assumed or amended for an Option or other Award pursuant to this
paragraph. The Company may hold in escrow all or any portion of any such
consideration in order to effectuate any continuing restrictions.

            (ii) Acquisition Defined. An "Acquisition" shall mean: (x) the sale
of the Company by merger in which the shareholders of the Company in their
capacity as such no longer own a majority of the outstanding equity securities
of the Company (or its successor); or (y) any sale of all or substantially all
of the assets or capital stock of the Company (other than in a spin-off or
similar transaction) or (z) any other acquisition of the business of the
Company, as determined by the Board.

            (iii) Assumption of Options Upon Certain Events. In connection with
a merger or consolidation of an entity with the Company or the acquisition by
the Company of property or stock of an entity, the Board may grant Awards under
the Plan in substitution for stock and stock-based awards issued by such entity
or an affiliate thereof. The substitute Awards shall be granted on such terms
and conditions as the Board considers appropriate in the circumstances.

      f. Withholding. Each Participant shall pay to the Company, or make
provisions satisfactory to the Company for payment of, any taxes required by law
to be withheld in connection with Awards to such Participant no later than the
date of the event creating the tax liability. The Board may allow Participants
to satisfy such tax obligations in whole or in part by transferring shares of
Common Stock, including shares retained from the Award creating the tax
obligation, valued at their fair market value (as determined by the Board or as
determined pursuant to the applicable option agreement). The Company may, to the
extent permitted by law, deduct any such tax obligations from any payment of any
kind otherwise due to a Participant.

      g. Amendment of Awards. The Board may amend, modify or terminate any
outstanding Award including, but not limited to, substituting therefor another
Award of the same or a different type, changing the date of exercise or
realization, and converting an Incentive Stock Option to a Nonstatutory Stock
Option, provided that the Participant's consent to such action shall be required
unless the Board determines that the action, taking into account any related
action, would not materially and adversely affect the Participant.

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 5 -
<PAGE>

      h. Conditions on Delivery of Stock. The Company will not be obligated to
deliver any shares of Common Stock pursuant to the Plan or to remove
restrictions from shares previously delivered under the Plan until (i) all
conditions of the Award have been met or removed to the satisfaction of the
Company, (ii) in the opinion of the Company's counsel, all other legal matters
in connection with the issuance and delivery of such shares have been satisfied,
including any applicable securities laws and any applicable stock exchange or
stock market rules and regulations, and (iii) the Participant has executed and
delivered to the Company such representations or agreements as the Company may
consider appropriate to satisfy the requirements of any applicable laws, rules
or regulations.

      i. Acceleration. The Board may at any time provide that any Options shall
become immediately exercisable in full or in part, that any Restricted Stock
Awards shall be free of some or all restrictions, or that any other stock-based
Awards may become exercisable in full or in part or free of some or all
restrictions or conditions, or otherwise realizable in full or in part, as the
case may be, despite the fact that the foregoing actions may (i) cause the
application of Sections 280G and 4999 of the Code if a change in control of the
Company occurs, or (ii) disqualify all or part of the Option as an Incentive
Stock Option. In the event of the acceleration of the exercisability of one or
more outstanding Options, including pursuant to paragraph (e)(i), the Board may
provide, as a condition of full exercisability of any or all such Options, that
the Common Stock or other substituted consideration, including cash, as to which
exercisability has been accelerated shall be restricted and subject to
forfeiture back to the Company at the option of the Company at the cost thereof
upon termination of employment or other relationship, with the timing and other
terms of the vesting of such restricted stock or other consideration being
equivalent to the timing and other terms of the superseded exercise schedule of
the related Option.

8. Miscellaneous

      a. Definitions.

            (i) "Company," for purposes of eligibility under the Plan, shall
include any present or future subsidiary corporations of iRobot Corporation, as
defined in Section 424(f) of the Code (a "Subsidiary"), and any present or
future parent corporation of iRobot Corporation, as defined in Section 424(e) of
the Code. For purposes of Awards other than Incentive Stock Options, the term
"Company" shall include any other business venture in which the Company has a
direct or indirect significant interest, as determined by the Board in its sole
discretion.

            (ii) "Code" means the Internal Revenue Code of 1986, as amended, and
any regulations promulgated thereunder.

            (iii) "employee" for purposes of eligibility under the Plan (but not
for purposes of Section 4(b)) shall include a person to whom an offer of
employment has been extended by the Company.

      b. No Right To Employment or Other Status. No person shall have any claim
or right to be granted an Award, and the grant of an Award shall not be
construed as giving a

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 6 -
<PAGE>

Participant the right to continued employment or any other relationship with the
Company. The Company expressly reserves the right at any time to dismiss or
otherwise terminate its relationship with a Participant free from any liability
or claim under the Plan.

      c. No Rights As Stockholder. Subject to the provisions of the applicable
Award, no Participant or Designated Beneficiary shall have any rights as a
stockholder with respect to any shares of Common Stock to be distributed with
respect to an Award until becoming the record holder thereof.

      d. Effective Date and Term of Plan. The Plan became effective on November
12, 2004, the date on which the Original Plan was adopted by the Board. No
Awards shall be granted under the Plan after November 12, 2014, but Awards
previously granted may extend beyond that date.

      e. Amendment of Plan. The Board may amend, suspend or terminate the Plan
or any portion thereof at any time.

      f. Governing Law. The provisions of the Plan and all Awards made hereunder
shall be governed by and interpreted in accordance with the laws of Delaware,
without regard to any applicable conflicts of law.

                                   Original Plan adopted by the Board of
                                   Directors on November 12, 2004

                                   Original Plan approved by the stockholders
                                   on November 29, 2004

                                   Amendment and Restatement Approved by
                                   Board of Directors on February 9, 2005

                                   Amendment and Restatement Approved by
                                   Board of Directors on July 13, 2007

2004 Stock Option and Incentive Plan
(July 2007)

                                     - 7 -
<PAGE>

                               IROBOT CORPORATION

                        INCENTIVE STOCK OPTION AGREEMENT

     iRobot Corporation (the "Company") hereby grants the following stock option
pursuant to its 2004 Stock Option and Incentive Plan, as amended from time to
time. The terms and conditions attached hereto are also a part hereof.

<TABLE>
<S>                                               <C>
Name of optionee (the "Optionee")*:
Date of this option grant:
Number of shares of the Company's Common
Stock subject to this option ("Shares"):
Option exercise price per share:
Number, if any, of Shares that may be purchased
on or after the grant date:
Shares that are subject to vesting schedule:
Vesting Start Date:
</TABLE>

Vesting Schedule:

<TABLE>
<S>                                                <C>
One year from Vesting Start Date:                  ___% of the Shares
Two years from Vesting Start Date:                 ___% of the Shares
Three years from Vesting Start Date:               ___% of the Shares
Four years from Vesting Start Date:                ___% of the Shares
Five years from Vesting Start Date:                ___% of the Shares
All vesting is dependent on the continuation of a Business Relationship with the
Company, as provided herein.
Payment alternatives:                              Section 7(a)(i) through (iii)
</TABLE>

     This option satisfies in full all commitments that the Company has to the
Optionee with respect to the issuance of stock, stock options or other equity
securities.

                                        IROBOT CORPORATION


-------------------------------------   By:
Signature of Optionee                       ------------------------------------
                                        Name of Officer:
-------------------------------------                    -----------------------
Street Address                          Title:
                                               ---------------------------------
-------------------------------------
City/State/Zip Code

----------
*    N.B.: This form of agreement is designed for grants of "incentive stock
     options" to employees who, at time of grant, are not 10% stockholders.

<PAGE>

                               IROBOT CORPORATION

      INCENTIVE STOCK OPTION AGREEMENT -- INCORPORATED TERMS AND CONDITIONS

     1. Grant Under Plan. This option is granted pursuant to and is governed by
the Company's 2004 Stock Option and Incentive Plan, as amended from time to time
(the "Plan") and, unless the context otherwise requires, terms used herein shall
have the same meaning as in the Plan.

     2. Grant as Incentive Stock Option. This option is intended to qualify as
an incentive stock option under Section 422 of the Internal Revenue Code of
1986, as amended, and the regulations thereunder (the "Code").

     3. Vesting of Option.

          (a) Vesting if Business Relationship Continues. The Optionee may
     exercise this option on or after the date of this option grant for the
     number of shares of Common Stock, if any, set forth (or, to the extent
     applicable, derived from the percentages set forth) on the cover page
     hereof. If the Optionee has continuously maintained a Business Relationship
     (as defined below) with the Company through the dates listed on the vesting
     schedule set forth on the cover page hereof, the Optionee may exercise this
     option for the additional number of shares of Common Stock set opposite the
     applicable vesting date. Notwithstanding the foregoing, the Board may, in
     its discretion, accelerate the date that any installment of this option
     becomes exercisable. The foregoing rights are cumulative and may be
     exercised only before the date which is ten years from the date of this
     option grant.

          (b) For purposes hereof, "Business Relationship" shall mean service to
     the Company or its successor in the capacity of an employee, officer,
     director or consultant.

     4.   Termination of Business Relationship.

          (a) Termination. If the Optionee's Business Relationship with the
     Company ceases, voluntarily or involuntarily, with or without cause, no
     further installments of this option shall become exercisable, and this
     option shall expire (may no longer be exercised) after the passage of 90
     days from the date of termination, but in no event later than the scheduled
     expiration date. Any determination under this agreement as to the status of
     a Business Relationship or other matters referred to above shall be made in
     good faith by the Board of Directors of the Company.

          (b) Employment Status. For purposes hereof, with respect to employees
     of the Company, employment shall not be considered as having terminated
     during any leave of absence if such leave of absence has been approved in
     writing by the Company and if such written approval contractually obligates
     the Company to continue the employment of the Optionee after the approved
     period of absence; in the event of such an approved leave of absence,
     vesting of this option shall be suspended (and the period of the leave of

<PAGE>

                                      -2-


     absence shall be added to all vesting dates) unless otherwise provided in
     the Company's written approval of the leave of absence. For purposes
     hereof, a termination of employment followed by another Business
     Relationship shall be deemed a termination of the Business Relationship
     with all vesting to cease unless the Company enters into a written
     agreement related to such other Business Relationship in which it is
     specifically stated that there is no termination of the Business
     Relationship under this agreement. This option shall not be affected by any
     change of employment within or among the Company and its Subsidiaries so
     long as the Optionee continuously remains an employee of the Company or any
     Subsidiary.

     5. Death; Disability.

          (a) Death. Upon the death of the Optionee while the Optionee is
     maintaining a Business Relationship with the Company, this option may be
     exercised, to the extent otherwise exercisable on the date of the
     Optionee's death, by the Optionee's estate, personal representative or
     beneficiary to whom this option has been transferred pursuant to Section
     10, only at any time within 180 days after the date of death, but not later
     than the scheduled expiration date.

          (b) Disability. If the Optionee ceases to maintain a Business
     Relationship with the Company by reason of his or her disability, this
     option may be exercised, to the extent otherwise exercisable on the date of
     cessation of the Business Relationship, only at any time within 180 days
     after such cessation of the Business Relationship, but not later than the
     scheduled expiration date. For purposes hereof, "disability" means
     "permanent and total disability" as defined in Section 22(e)(3) of the
     Code.

     6. Partial Exercise. This option may be exercised in part at any time and
from time to time within the above limits, except that this option may not be
exercised for a fraction of a share.

     7. Payment of Exercise Price.

          (a) Payment Options. The exercise price shall be paid by one or any
     combination of the following forms of payment that are applicable to this
     option, as indicated on the cover page hereof:

          (i)  by cash or check payable to the order of the Company; or

          (ii) if the Common Stock is then traded on a national securities
               exchange or on the Nasdaq National Market (or successor trading
               system), delivery of an irrevocable and unconditional
               undertaking, satisfactory in form and substance to the Company,
               by a creditworthy broker to deliver promptly to the Company
               sufficient funds to pay the exercise price, or delivery by the
               Optionee to the Company of a copy of irrevocable and
               unconditional instructions, satisfactory in form and substance to
               the Company, to a

<PAGE>

                                      -3-


               creditworthy broker to deliver promptly to the Company cash or a
               check sufficient to pay the exercise price; or

          (iii) subject to Section 7(b) below, if the Common Stock is then
               traded on a national securities exchange or on the Nasdaq
               National Market (or successor trading system), by delivery of
               shares of Common Stock having a fair market value equal as of the
               date of exercise to the option price.

          In the case of (iii) above, fair market value as of the date of
     exercise shall be determined as of the last business day for which such
     prices or quotes are available prior to the date of exercise and shall mean
     (i) the last reported sale price (on that date) of the Common Stock on the
     principal national securities exchange on which the Common Stock is traded,
     if the Common Stock is then traded on a national securities exchange; or
     (ii) the last reported sale price (on that date) of the Common Stock on the
     Nasdaq National Market (or successor trading system), if the Common Stock
     is not then traded on a national securities exchange.

          (b) Limitations on Payment by Delivery of Common Stock. If Section
     7(a)(iii) is applicable, and if the Optionee delivers Common Stock held by
     the Optionee ("Old Stock") to the Company in full or partial payment of the
     exercise price and the Old Stock so delivered is subject to restrictions or
     limitations imposed by agreement between the Optionee and the Company, an
     equivalent number of Shares shall be subject to all restrictions and
     limitations applicable to the Old Stock to the extent that the Optionee
     paid for the Shares by delivery of Old Stock, in addition to any
     restrictions or limitations imposed by this agreement. Notwithstanding the
     foregoing, the Optionee may not pay any part of the exercise price hereof
     by transferring Common Stock to the Company unless such Common Stock has
     been owned by the Optionee free of any substantial risk of forfeiture for
     at least six months.

     8. Securities Laws Restrictions on Resale. Until registered under the
Securities Act of 1933, as amended, or any successor statute (the "Securities
Act"), the Shares will be illiquid and will be deemed to be "restricted
securities" for purposes of the Securities Act. Accordingly, such shares must be
sold in compliance with the registration requirements of the Securities Act or
an exemption therefrom and may need to be held indefinitely. Unless the Shares
have been registered under the Securities Act, each certificate evidencing any
of the Shares shall bear a restrictive legend specified by the Company.

     9. Method of Exercising Option. Subject to the terms and conditions of this
agreement, this option may be exercised by written notice to the Company at its
principal executive office, or to such transfer agent as the Company shall
designate. Such notice shall state the election to exercise this option and the
number of Shares for which it is being exercised and shall be signed by the
person or persons so exercising this option. Such notice shall be accompanied by
payment of the full purchase price of such shares, and the Company shall deliver
a certificate or certificates representing such shares as soon as practicable
after the notice shall be received. Such certificate or certificates shall be
registered in the name of the person or persons so exercising this option (or,
if this option shall be exercised by the Optionee and if the

<PAGE>

                                       -4-


Optionee shall so request in the notice exercising this option, shall be
registered in the name of the Optionee and another person jointly, with right of
survivorship). In the event this option shall be exercised, pursuant to Section
5 hereof, by any person or persons other than the Optionee, such notice shall be
accompanied by appropriate proof of the right of such person or persons to
exercise this option.

     10. Option Not Transferable. This option is not transferable or assignable
except by will or by the laws of descent and distribution. During the Optionee's
lifetime only the Optionee can exercise this option.

     11. No Obligation to Exercise Option. The grant and acceptance of this
option imposes no obligation on the Optionee to exercise it.

     12. No Obligation to Continue Business Relationship. Neither the Plan, this
agreement, nor the grant of this option imposes any obligation on the Company to
continue the Optionee in employment or other Business Relationship.

     13. Adjustments. Except as is expressly provided in the Plan with respect
to certain changes in the capitalization of the Company, no adjustment shall be
made for dividends or similar rights for which the record date is prior to such
date of exercise.

     14. Withholding Taxes. If the Company in its discretion determines that it
is obligated to withhold any tax in connection with the exercise of this option,
or in connection with the transfer of, or the lapse of restrictions on, any
Common Stock or other property acquired pursuant to this option, the Optionee
hereby agrees that the Company may withhold from the Optionee's wages or other
remuneration the appropriate amount of tax. At the discretion of the Company,
the amount required to be withheld may be withheld in cash from such wages or
other remuneration or in kind from the Common Stock or other property otherwise
deliverable to the Optionee on exercise of this option. The Optionee further
agrees that, if the Company does not withhold an amount from the Optionee's
wages or other remuneration sufficient to satisfy the withholding obligation of
the Company, the Optionee will make reimbursement on demand, in cash, for the
amount underwithheld.

     15. Restrictions on Transfer; Company's Right of First Refusal.

          (a) Exercise of Right. Shares may not be transferred without the
     Company's written consent except by will, by the laws of descent and
     distribution or in accordance with the further provisions of this Section
     15. If the Optionee desires to transfer all or any part of the Shares to
     any person other than the Company (an "Offeror"), the Optionee shall: (i)
     obtain in writing an irrevocable and unconditional bona fide offer (the
     "Offer") for the purchase thereof from the Offeror; and (ii) give written
     notice (the "Option Notice") to the Company setting forth the Optionee's
     desire to transfer such shares, which Option Notice shall be accompanied by
     a photocopy of the Offer and shall set forth at least the name and address
     of the Offeror and the price and terms of the Offer. Upon receipt of the
     Option Notice, the Company shall have an assignable option to purchase any
     or all of such Shares (the "Offered Shares") specified in the Option
     Notice,

<PAGE>

                                       -5-


     such option to be exercisable by giving, within 30 days after receipt of
     the Option Notice, a written counter-notice to the Optionee. If the Company
     elects to purchase all of such Offered Shares, it shall be obligated to
     purchase, and the Optionee shall be obligated to sell to the Company or its
     assignee, such Offered Shares at the price and terms indicated in the Offer
     within 30 days from the date of delivery by the Company of such
     counter-notice. To the extent that the consideration proposed to be paid by
     the Offeror for the shares consists of property other than cash or a
     promissory note, the consideration required to be paid by the Company may
     consist of cash equal to the fair market value of such property, as
     determined in good faith by the Board of Directors of the Company.

          (b) Sale of Shares to Offeror. The Optionee may, for 60 days after the
     expiration of the 30-day option period as set forth in Section 15(a), sell
     to the Offeror, pursuant to the terms of the Offer, all of such Offered
     Shares not purchased or agreed to be purchased by the Company or its
     assignee; provided, however, that the Optionee shall not sell such Shares
     to such Offeror if such Offeror is a competitor of the Company and the
     Company gives written notice to the Optionee, within 30 days of its receipt
     of the Option Notice, stating that the Optionee shall not sell his or her
     Shares to such Offeror; and provided, further, that prior to the sale of
     such Shares to an Offeror, such Offeror shall execute an agreement with the
     Company pursuant to which such Offeror agrees to be subject to the
     restrictions set forth in this Section 15. If any or all of such Shares are
     not sold pursuant to an Offer within the time permitted above, the unsold
     Shares shall remain subject to the terms of this Section 15.

          (c) Failure to Deliver Shares. If the Optionee (or his or her legal
     representative) who has become obligated to sell Shares hereunder shall
     fail to deliver such shares to the Company in accordance with the terms of
     this agreement, the Company may, at its option, in addition to all other
     remedies it may have, mail to the Optionee the purchase price for such
     shares as is herein specified. Thereupon, the Company: (i) shall cancel on
     its books the certificate or certificates representing such Shares to be
     sold; and (ii) shall issue, in lieu thereof, a new certificate or
     certificates in the name of the Company representing such Shares (or cancel
     such Shares), and thereupon all of such Optionee's rights in and to such
     Shares shall terminate.

          (d) Expiration of Company's Right of First Refusal and Transfer
     Restrictions. The first refusal rights of the Company and the transfer
     restrictions set forth in this Section 15 shall expire as to Shares
     immediately prior to the closing of an underwritten public offering of
     Common Stock by the Company pursuant to an effective registration statement
     filed under the Securities Act. In addition, if the Company and the
     Optionee are parties to an agreement containing first refusal provisions
     similar to the foregoing, such other agreement shall control.

     16. Early Disposition. The Optionee agrees to notify the Company in writing
immediately after the Optionee transfers any Shares, if such transfer occurs on
or before the later of (a) the date that is two years after the date of this
agreement or (b) the date that is one year after the date on which the Optionee
acquired such Shares. The Optionee also agrees to provide

<PAGE>

                                      -6-


the Company with any information concerning any such transfer required by the
Company for tax purposes.

     17. Lock-up Agreement. The Optionee agrees that, in the event that the
Company effects an initial underwritten public offering of Common Stock
registered under the Securities Act, he, she or it shall not sell, offer for
sale or otherwise dispose of, directly or indirectly, the Shares, or any other
shares of Common Stock or any securities convertible into or exchangeable for
Common Stock held immediately prior to the effectiveness of the Securities Act
registration for such offering, without the prior written consent of the
managing underwriter(s) of the offering, for such period of time after the
execution of an underwriting agreement in connection with such offering that all
of the Company's then directors and executive officers agree to be similarly
bound. The underwriters of the offering are intended third-party beneficiaries
of this Section 17 and shall have the right, power and authority to enforce the
provisions hereof as though they were a party hereto. The Optionee further
agrees to execute such agreements as may be reasonably requested by the
underwriters of the offering that are consistent with this Section 17 or that
are necessary to give further effect thereto. In order to enforce the foregoing
covenant, the Company may impose stop-transfer instructions with respect to the
shares subject to the foregoing restrictions (and the shares or securities of
every other person subject to the foregoing restriction) until the end of such
period.

     18. Arbitration. Any dispute, controversy, or claim arising out of, in
connection with, or relating to the performance of this agreement or its
termination shall be settled by arbitration in the Commonwealth of
Massachusetts, pursuant to the rules then obtaining of the American Arbitration
Association. Any award shall be final, binding and conclusive upon the parties
and a judgment rendered thereon may be entered in any court having jurisdiction
thereof.

     19. Provision of Documentation to Optionee. By signing this agreement the
Optionee acknowledges receipt of a copy of this agreement and a copy of the
Plan.

     20. Miscellaneous.

          (a) Notices. All notices hereunder shall be in writing and shall be
     deemed given when sent by mail, if to the Optionee, to the address set
     forth on the cover page or at the address shown on the records of the
     Company, and if to the Company, to the Company's principal executive
     offices, attention of the Corporate Secretary.

          (b) Entire Agreement; Modification. This agreement constitutes the
     entire agreement between the parties relative to the subject matter hereof,
     and supersedes all proposals, written or oral, and all other communications
     between the parties relating to the subject matter of this agreement. This
     agreement may be modified, amended or rescinded only by a written agreement
     executed by both parties.

          (c) Fractional Shares. If this option becomes exercisable for a
     fraction of a share because of the adjustment provisions contained in the
     Plan, such fraction shall be rounded down.

<PAGE>

                                      -7-


          (d) Issuances of Securities; Changes in Capital Structure. Except as
     expressly provided herein or in the Plan, no issuance by the Company of
     shares of stock of any class, or securities convertible into shares of
     stock of any class, shall affect, and no adjustment by reason thereof shall
     be made with respect to, the number or price of shares subject to this
     option. No adjustments need be made for dividends paid in cash or in
     property other than securities of the Company. If there shall be any change
     in the Common Stock of the Company through merger, consolidation,
     reorganization, recapitalization, stock dividend, stock split, combination
     or exchange of shares, spin-off, split-up or other similar change in
     capitalization or event, the restrictions contained in this agreement shall
     apply with equal force to additional and/or substitute securities, if any,
     received by the Optionee in exchange for, or by virtue of his or her
     ownership of, Shares, except as otherwise determined by the Board.

          (e) Severability. The invalidity, illegality or unenforceability of
     any provision of this agreement shall in no way affect the validity,
     legality or enforceability of any other provision.

          (f) Successors and Assigns. This agreement shall be binding upon and
     inure to the benefit of the parties hereto and their respective successors
     and assigns, subject to the limitations set forth in Section 10 hereof.

          (g) Governing Law. This agreement shall be governed by and interpreted
     in accordance with the laws of the state of Delaware, without giving effect
     to the principles of the conflicts of laws thereof.

<PAGE>

                               IROBOT CORPORATION

                      NON-QUALIFIED STOCK OPTION AGREEMENT

     iRobot Corporation (the "Company") hereby grants the following stock option
pursuant to its 2004 Stock Option and Incentive Plan, as amended from time to
time. The terms and conditions attached hereto are also a part hereof.

<TABLE>
<S>                                               <C>
Name of optionee (the "Optionee"):
Date of this option grant:
Number of shares of the Company's Common Stock
subject to this option ("Shares"):
Option exercise price per share:
Number, if any, of Shares that may be purchased
on or after the grant date:
Shares that are subject to vesting schedule:
Vesting Start Date:
</TABLE>

Vesting Schedule:

<TABLE>
<S>                                                 <C>
One year from Vesting Start Date:                   ___% of the Shares
Two years from Vesting Start Date:                  ___% of the Shares
Three years from Vesting Start Date:                ___% of the Shares
Four years from Vesting Start Date:                 ___% of the Shares
Five years from Vesting Start Date:                 ___% of the Shares
All vesting is dependent on the continuation of a Business Relationship with the
Company, as provided herein.
Payment alternatives:                               Section 7(a)(i) through (iii)
</TABLE>

     This option satisfies in full all commitments that the Company has to the
Optionee with respect to the issuance of stock, stock options or other equity
securities.

                                        IROBOT CORPORATION


                                        By:
-------------------------------------       ------------------------------------
Signature of Optionee                   Name of Officer:
                                                         -----------------------
-------------------------------------   Title:
Street Address                                 ---------------------------------

-------------------------------------
City/State/Zip Code

<PAGE>

                               IROBOT CORPORATION

    NON-QUALIFIED STOCK OPTION AGREEMENT -- INCORPORATED TERMS AND CONDITIONS

     1. Grant Under Plan. This option is granted pursuant to and is governed by
the Company's 2004 Stock Option and Incentive Plan, as amended from time to time
(the "Plan") and, unless the context otherwise requires, terms used herein shall
have the same meaning as in the Plan.

     2. Designation of Option. This Option is intended to be a Nonstatutory
Stock Option and is not intended to qualify as an Incentive Stock Option as
defined in Section 422 of the Internal Revenue Code of 1986, as amended and the
regulations thereunder (the "Code").

     3. Vesting of Option.

          (a) Vesting if Business Relationship Continues. The Optionee may
     exercise this option on or after the date of this option grant for the
     number of shares of Common Stock, if any, set forth (or, to the extent
     applicable, derived from the percentages set forth) on the cover page
     hereof. If the Optionee has continuously maintained a Business Relationship
     (as defined below) with the Company through the dates listed on the vesting
     schedule set forth on the cover page hereof, the Optionee may exercise this
     option for the additional number of shares of Common Stock set opposite the
     applicable vesting date. Notwithstanding the foregoing, the Board may, in
     its discretion, accelerate the date that any installment of this option
     becomes exercisable. The foregoing rights are cumulative and may be
     exercised only before the date which is ten years from the date of this
     option grant.

          (b) For purposes hereof, "Business Relationship" shall mean service to
     the Company or its successor in the capacity of an employee, officer,
     director or consultant.

     4. Termination of Business Relationship.

          (a) Termination. If the Optionee's Business Relationship with the
     Company ceases, voluntarily or involuntarily, with or without cause, no
     further installments of this option shall become exercisable, and this
     option shall expire (may no longer be exercised) after the passage of three
     months from the date of termination, but in no event later than the
     scheduled expiration date. Any determination under this agreement as to the
     status of a Business Relationship or other matters referred to above shall
     be made in good faith by the Board of Directors of the Company.

          (b) Employment Status. For purposes hereof, with respect to employees
     of the Company, employment shall not be considered as having terminated
     during any leave of absence if such leave of absence has been approved in
     writing by the Company and if such written approval contractually obligates
     the Company to continue the employment of the Optionee after the approved
     period of absence; in the event of such an approved leave

<PAGE>

                                      -2-


     of absence, vesting of this option shall be suspended (and the period of
     the leave of absence shall be added to all vesting dates) unless otherwise
     provided in the Company's written approval of the leave of absence. For
     purposes hereof, a termination of employment followed by another Business
     Relationship shall be deemed a termination of the Business Relationship
     with all vesting to cease unless the Company enters into a written
     agreement related to such other Business Relationship in which it is
     specifically stated that there is no termination of the Business
     Relationship under this agreement. This option shall not be affected by any
     change of employment within or among the Company and its Subsidiaries so
     long as the Optionee continuously remains an employee of the Company or any
     Subsidiary.

     5. Death; Disability.

          (a) Death. Upon the death of the Optionee while the Optionee is
     maintaining a Business Relationship with the Company, this option may be
     exercised, to the extent otherwise exercisable on the date of the
     Optionee's death, by the Optionee's estate, personal representative or
     beneficiary to whom this option has been transferred pursuant to Section
     10, only at any time within 180 days after the date of death, but not later
     than the scheduled expiration date.

          (b) Disability. If the Optionee ceases to maintain a Business
     Relationship with the Company by reason of his or her disability, this
     option may be exercised, to the extent otherwise exercisable on the date of
     cessation of the Business Relationship, only at any time within 180 days
     after such cessation of the Business Relationship, but not later than the
     scheduled expiration date. For purposes hereof, "disability" means
     "permanent and total disability" as defined in Section 22(e)(3) of the
     Code.

     6. Partial Exercise. This option may be exercised in part at any time and
from time to time within the above limits, except that this option may not be
exercised for a fraction of a share.

     7. Payment of Exercise Price.

          (a) Payment Options. The exercise price shall be paid by one or any
     combination of the following forms of payment that are applicable to this
     option, as indicated on the cover page hereof:

          (i)  by cash or check payable to the order of the Company; or

          (ii) if the Common Stock is then traded on a national securities
               exchange or on the Nasdaq National Market (or successor trading
               system), delivery of an irrevocable and unconditional
               undertaking, satisfactory in form and substance to the Company,
               by a creditworthy broker to deliver promptly to the Company
               sufficient funds to pay the exercise price, or delivery by the
               Optionee to the Company of a copy of irrevocable and
               unconditional

<PAGE>

                                      -3-


               instructions, satisfactory in form and substance to the Company,
               to a creditworthy broker to deliver promptly to the Company cash
               or a check sufficient to pay the exercise price; or

          (iii) subject to Section 7(b) below, if the Common Stock is then
               traded on a national securities exchange or on the Nasdaq
               National Market (or successor trading system), by delivery of
               shares of Common Stock having a fair market value equal as of the
               date of exercise to the option price.

          In the case of (iii) above, fair market value as of the date of
     exercise shall be determined as of the last business day for which such
     prices or quotes are available prior to the date of exercise and shall mean
     (i) the last reported sale price (on that date) of the Common Stock on the
     principal national securities exchange on which the Common Stock is traded,
     if the Common Stock is then traded on a national securities exchange; or
     (ii) the last reported sale price (on that date) of the Common Stock on the
     Nasdaq National Market (or successor trading system), if the Common Stock
     is not then traded on a national securities exchange.

          (b) Limitations on Payment by Delivery of Common Stock. If Section
     7(a)(iii) is applicable, and if the Optionee delivers Common Stock held by
     the Optionee ("Old Stock") to the Company in full or partial payment of the
     exercise price and the Old Stock so delivered is subject to restrictions or
     limitations imposed by agreement between the Optionee and the Company, an
     equivalent number of Shares shall be subject to all restrictions and
     limitations applicable to the Old Stock to the extent that the Optionee
     paid for the Shares by delivery of Old Stock, in addition to any
     restrictions or limitations imposed by this agreement. Notwithstanding the
     foregoing, the Optionee may not pay any part of the exercise price hereof
     by transferring Common Stock to the Company unless such Common Stock has
     been owned by the Optionee free of any substantial risk of forfeiture for
     at least six months.

     8. Securities Laws Restrictions on Resale. Until registered under the
Securities Act of 1933, as amended, or any successor statute (the "Securities
Act"), the Shares will be illiquid and will be deemed to be "restricted
securities" for purposes of the Securities Act. Accordingly, such shares must be
sold in compliance with the registration requirements of the Securities Act or
an exemption therefrom and may need to be held indefinitely. Unless the Shares
have been registered under the Securities Act, each certificate evidencing any
of the Shares shall bear a restrictive legend specified by the Company.

     9. Method of Exercising Option. Subject to the terms and conditions of this
agreement, this option may be exercised by written notice to the Company at its
principal executive office, or to such transfer agent as the Company shall
designate. Such notice shall state the election to exercise this option and the
number of Shares for which it is being exercised and shall be signed by the
person or persons so exercising this option. Such notice shall be accompanied by
payment of the full purchase price of such shares, and the Company shall deliver
a certificate or certificates representing such shares as soon as practicable
after the notice shall be

<PAGE>

                                      -4-


received. Such certificate or certificates shall be registered in the name of
the person or persons so exercising this option (or, if this option shall be
exercised by the Optionee and if the Optionee shall so request in the notice
exercising this option, shall be registered in the name of the Optionee and
another person jointly, with right of survivorship). In the event this option
shall be exercised, pursuant to Section 5 hereof, by any person or persons other
than the Optionee, such notice shall be accompanied by appropriate proof of the
right of such person or persons to exercise this option.

     10. Option Not Transferable. This option is not transferable or assignable
except by will or by the laws of descent and distribution. During the Optionee's
lifetime only the Optionee can exercise this option.

     11. No Obligation to Exercise Option. The grant and acceptance of this
option imposes no obligation on the Optionee to exercise it.

     12. No Obligation to Continue Business Relationship. Neither the Plan, this
agreement, nor the grant of this option imposes any obligation on the Company to
continue the Optionee in employment or other Business Relationship.

     13. Adjustments. Except as is expressly provided in the Plan with respect
to certain changes in the capitalization of the Company, no adjustment shall be
made for dividends or similar rights for which the record date is prior to such
date of exercise.

     14. Withholding Taxes. If the Company in its discretion determines that it
is obligated to withhold any tax in connection with the exercise of this option,
or in connection with the transfer of, or the lapse of restrictions on, any
Common Stock or other property acquired pursuant to this option, the Optionee
hereby agrees that the Company may withhold from the Optionee's wages or other
remuneration the appropriate amount of tax. At the discretion of the Company,
the amount required to be withheld may be withheld in cash from such wages or
other remuneration or in kind from the Common Stock or other property otherwise
deliverable to the Optionee on exercise of this option. The Optionee further
agrees that, if the Company does not withhold an amount from the Optionee's
wages or other remuneration sufficient to satisfy the withholding obligation of
the Company, the Optionee will make reimbursement on demand, in cash, for the
amount underwithheld.

     15. Restrictions on Transfer; Company's Right of First Refusal.

          (a) Exercise of Right. Shares may not be transferred without the
     Company's written consent except by will, by the laws of descent and
     distribution or in accordance with the further provisions of this Section
     15. If the Optionee desires to transfer all or any part of the Shares to
     any person other than the Company (an "Offeror"), the Optionee shall: (i)
     obtain in writing an irrevocable and unconditional bona fide offer (the
     "Offer") for the purchase thereof from the Offeror; and (ii) give written
     notice (the "Option Notice") to the Company setting forth the Optionee's
     desire to transfer such shares, which Option Notice shall be accompanied by
     a photocopy of the Offer and shall set forth at

<PAGE>

                                      -5-


     least the name and address of the Offeror and the price and terms of the
     Offer. Upon receipt of the Option Notice, the Company shall have an
     assignable option to purchase any or all of such Shares (the "Offered
     Shares") specified in the Option Notice, such option to be exercisable by
     giving, within 30 days after receipt of the Option Notice, a written
     counter-notice to the Optionee. If the Company elects to purchase all of
     such Offered Shares, it shall be obligated to purchase, and the Optionee
     shall be obligated to sell to the Company or its assignee, such Offered
     Shares at the price and terms indicated in the Offer within 30 days from
     the date of delivery by the Company of such counter-notice. To the extent
     that the consideration proposed to be paid by the Offeror for the shares
     consists of property other than cash or a promissory note, the
     consideration required to be paid by the Company may consist of cash equal
     to the fair market value of such property, as determined in good faith by
     the Board of Directors of the Company.

          (b) Sale of Shares to Offeror. The Optionee may, for 60 days after the
     expiration of the 30-day option period as set forth in Section 15(a), sell
     to the Offeror, pursuant to the terms of the Offer, all of such Offered
     Shares not purchased or agreed to be purchased by the Company or its
     assignee; provided, however, that the Optionee shall not sell such Shares
     to such Offeror if such Offeror is a competitor of the Company and the
     Company gives written notice to the Optionee, within 30 days of its receipt
     of the Option Notice, stating that the Optionee shall not sell his or her
     Shares to such Offeror; and provided, further, that prior to the sale of
     such Shares to an Offeror, such Offeror shall execute an agreement with the
     Company pursuant to which such Offeror agrees to be subject to the
     restrictions set forth in this Section 15. If any or all of such Shares are
     not sold pursuant to an Offer within the time permitted above, the unsold
     Shares shall remain subject to the terms of this Section 15.

          (c) Failure to Deliver Shares. If the Optionee (or his or her legal
     representative) who has become obligated to sell Shares hereunder shall
     fail to deliver such shares to the Company in accordance with the terms of
     this agreement, the Company may, at its option, in addition to all other
     remedies it may have, mail to the Optionee the purchase price for such
     shares as is herein specified. Thereupon, the Company: (i) shall cancel on
     its books the certificate or certificates representing such Shares to be
     sold; and (ii) shall issue, in lieu thereof, a new certificate or
     certificates in the name of the Company representing such Shares (or cancel
     such Shares), and thereupon all of such Optionee's rights in and to such
     Shares shall terminate.

          (d) Expiration of Company's Right of First Refusal and Transfer
     Restrictions. The first refusal rights of the Company and the transfer
     restrictions set forth in this Section 15 shall expire as to Shares
     immediately prior to the closing of an underwritten public offering of
     Common Stock by the Company pursuant to an effective registration statement
     filed under the Securities Act. In addition, if the Company and the
     Optionee are parties to an agreement containing first refusal provisions
     similar to the foregoing, such other agreement shall control.

<PAGE>

                                      -6-


     16. Early Disposition. The Optionee agrees to notify the Company in writing
immediately after the Optionee transfers any Shares, if such transfer occurs on
or before the later of (a) the date that is two years after the date of this
agreement or (b) the date that is one year after the date on which the Optionee
acquired such Shares. The Optionee also agrees to provide the Company with any
information concerning any such transfer required by the Company for tax
purposes.

     17. Lock-up Agreement. The Optionee agrees that, in the event that the
Company effects an initial underwritten public offering of Common Stock
registered under the Securities Act, he, she or it shall not sell, offer for
sale or otherwise dispose of, directly or indirectly, the Shares, or any other
shares of Common Stock or any securities convertible into or exchangeable for
Common Stock held immediately prior to the effectiveness of the Securities Act
registration for such offering, without the prior written consent of the
managing underwriter(s) of the offering, for such period of time after the
execution of an underwriting agreement in connection with such offering that all
of the Company's then directors and executive officers agree to be similarly
bound. The underwriters of the offering are intended third-party beneficiaries
of this Section 17 and shall have the right, power and authority to enforce the
provisions hereof as though they were a party hereto. The Optionee further
agrees to execute such agreements as may be reasonably requested by the
underwriters of the offering that are consistent with this Section 17 or that
are necessary to give further effect thereto. In order to enforce the foregoing
covenant, the Company may impose stop-transfer instructions with respect to the
shares subject to the foregoing restrictions (and the shares or securities of
every other person subject to the foregoing restriction) until the end of such
period.

     18. Arbitration. Any dispute, controversy, or claim arising out of, in
connection with, or relating to the performance of this agreement or its
termination shall be settled by arbitration in the Commonwealth of
Massachusetts, pursuant to the rules then obtaining of the American Arbitration
Association. Any award shall be final, binding and conclusive upon the parties
and a judgment rendered thereon may be entered in any court having jurisdiction
thereof.

     19. Provision of Documentation to Optionee. By signing this agreement the
Optionee acknowledges receipt of a copy of this agreement and a copy of the
Plan.

     20. Miscellaneous.

          (a) Notices. All notices hereunder shall be in writing and shall be
     deemed given when sent by mail, if to the Optionee, to the address set
     forth on the cover page or at the address shown on the records of the
     Company, and if to the Company, to the Company's principal executive
     offices, attention of the Corporate Secretary.

          (b) Entire Agreement; Modification. This agreement constitutes the
     entire agreement between the parties relative to the subject matter hereof,
     and supersedes all proposals, written or oral, and all other communications
     between the parties relating to the subject matter of this agreement. This
     agreement may be modified, amended or rescinded only by a written agreement
     executed by both parties.

<PAGE>

                                      -7-


          (c) Fractional Shares. If this option becomes exercisable for a
     fraction of a share because of the adjustment provisions contained in the
     Plan, such fraction shall be rounded down.

          (d) Issuances of Securities; Changes in Capital Structure. Except as
     expressly provided herein or in the Plan, no issuance by the Company of
     shares of stock of any class, or securities convertible into shares of
     stock of any class, shall affect, and no adjustment by reason thereof shall
     be made with respect to, the number or price of shares subject to this
     option. No adjustments need be made for dividends paid in cash or in
     property other than securities of the Company. If there shall be any change
     in the Common Stock of the Company through merger, consolidation,
     reorganization, recapitalization, stock dividend, stock split, combination
     or exchange of shares, spin-off, split-up or other similar change in
     capitalization or event, the restrictions contained in this agreement shall
     apply with equal force to additional and/or substitute securities, if any,
     received by the Optionee in exchange for, or by virtue of his or her
     ownership of, Shares, except as otherwise determined by the Board.

          (e) Severability. The invalidity, illegality or unenforceability of
     any provision of this agreement shall in no way affect the validity,
     legality or enforceability of any other provision.

          (f) Successors and Assigns. This agreement shall be binding upon and
     inure to the benefit of the parties hereto and their respective successors
     and assigns, subject to the limitations set forth in Section 10 hereof.

          (g) Governing Law. This agreement shall be governed by and interpreted
     in accordance with the laws of the state of Delaware, without giving effect
     to the principles of the conflicts of laws thereof.