PATENT ABSTRACT
Embodiments of play systems having multiple curved structural members are disclosed. Play systems illustratively include a first quarter of an ellipse, a second quarter of an ellipse, a third quarter of an ellipse, and a fourth quarter of an ellipse. Each ellipse quarter has first and second ends. The first, the second, the third, and the fourth ellipse quarters are oriented approximately vertically relative to a surface such that the first ends of the ellipse quarters contact the surface and the second ends of the ellipse quarters are above the surface. The first ends of the ellipse quarters are optionally spaced further apart from each other than the second ends of the ellipse quarters.

PATENT DESCRIPTION
REFERENCE TO RELATED CASES 
     The present application is a continuation of application Ser. No. 11/827,851, filed on Jul. 13, 2007, the content of which is hereby incorporated by reference in its entirety. Application Ser. No. 11/827/851 claims the benefit of U.S. Provisional Application No. 60/831,010, filed Jul. 14, 2006, the content of which is hereby incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     The focus of most current playground play systems is typically centered upon some type of large “post and deck” structure. In general, these systems promote “continuous play” to some extent, for example, where an individual can move from one play element to the next, possibly without ever touching the ground. However, it is typical that there are limited options for traversing from one play element to the next. The possible routes from element to element are often predetermined or even restricted. The design rarely encourages individuals to use their imagination in determining what path to take between elements. 
     One implication of the limitations of current play systems is that they tend to be perceived by older aged kids as being boring or otherwise unappealing. Also, the systems are not very effective in terms of encouraging activities that promote health without sacrificing fun. 
     SUMMARY 
     An aspect of the disclosure relates to play systems having multiple curved structural members. In one embodiment, play systems include a first quarter of an ellipse, a second quarter of an ellipse, a third quarter of an ellipse, and a fourth quarter of an ellipse. Each ellipse quarter has first and second ends. The first, the second, the third, and the fourth ellipse quarters are oriented approximately vertically relative to a surface such that the first ends of the ellipse quarters contact the surface and the second ends of the ellipse quarters are above the surface. The first ends of the ellipse quarters are illustratively spaced further apart from each other than the second ends of the ellipse quarters. 
     These and various other features and advantages that characterize the claimed embodiments will become apparent upon reading the following detailed description and upon reviewing the associated drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an arch-based play system. 
         FIG. 2  is a top plan view of the arch-based play system. 
         FIGS. 3-6  are side views of arch assemblies. 
         FIG. 7  is a schematic flow diagram of an attachment scheme for connecting adjoining arch assembly segments. 
         FIG. 8A  is a close up side view of a portion of an arch assembly. 
         FIG. 8B  is a side view of an arch assembly demonstrating an example distribution of arch tabs. 
         FIG. 9  is a perspective view of different embodiments of arch clamps. 
         FIG. 10  is a schematic view of a schema for connecting an arch assembly to a play element. 
         FIG. 11  is a side view of an arch assembly footing. 
         FIG. 12  is a perspective view of a stepping surface. 
         FIG. 13  is a perspective view of a ribbon slide. 
         FIG. 14  is a perspective view of a winding slide. 
         FIG. 15  is a perspective view of a cable rope climber. 
         FIG. 16  is a schematic representation of a scheme for attaching an elongated portion of a cable rope climber to an associated net assembly. 
         FIG. 17  is a schematic representation of a cable rope climber turnbuckle assembly. 
         FIG. 18  is a perspective view of a twisted net. 
         FIG. 19  is a perspective view of a climbing net. 
         FIG. 20  is a top view of the climbing net. 
         FIG. 21  is a perspective view of the climbing rings assembly. 
         FIG. 22  is a top view of a climbing rings assembly. 
         FIG. 23  is a perspective view of a pipe climber. 
         FIG. 24  is a perspective view of a rope climbing structure. 
         FIG. 25  is a perspective view of an arched bar structure. 
         FIG. 26  is a perspective view of a hanging bars ladder. 
         FIG. 27  is a perspective view of a pivoting walk-across. 
         FIG. 28  is a perspective view of a cable-disk climber. 
         FIG. 29  is a perspective view of a cable-disk climber platform assembly. 
         FIG. 30  is a perspective view of a ringed spinner. 
         FIG. 31  is a diagrammatic representation of a ringed spinner bottom portion and footer connection. 
         FIG. 32  is a side view of a ringed spinner footing. 
         FIG. 33  is a diagrammatic representation of a ringed spinner upper spinner mount and ring assembly connection. 
         FIG. 34  is a perspective view of a spiral spinner. 
         FIG. 35  is a perspective view of a talking post. 
         FIG. 36  is a schematic representation of a talking post footing scheme. 
         FIG. 37  is a perspective view of a cycler. 
         FIG. 38  is an exploded view of a cycler handhold assembly. 
         FIG. 39  is a perspective view of a curved post. 
         FIG. 40  is an exploded view of a spring bench. 
         FIG. 41  is a perspective view of one embodiment of an arch-based play system with integrated play elements. 
         FIG. 42  is a perspective view of another embodiment of an arch-based play system. 
         FIG. 43  is a perspective view of an arch assembly and an imaginary circle. 
         FIG. 44  is a top view of two arch assemblies and their imaginary circles. 
         FIG. 45  is a top view of four arch assemblies and their imaginary circles. 
         FIG. 46  is a perspective view of an arch assembly and an imaginary line. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is a perspective view of an arch-based play system  100 . System  100  includes arch assemblies  101 ,  102 ,  103 , and  104 . System  100  also includes a plurality of arch clamps  105  (an illustrative two are identified in  FIG. 1 ). Also included are a plurality of arch tabs  106  (an illustrative two are identified in  FIG. 1 ). 
     Before proceeding further into the present description, it is worth noting that the terms “arch” and “arch assembly” as used herein are not necessarily limited to an upwardly curved structures as shown in  FIG. 1 . Those skilled in the art will appreciate that similar over arching structures can be utilized even if such structures do not have a continuous uninterrupted curvature. The illustrated embodiment is one example of the type of structure that is to be considered within the scope of the present invention. 
     As will become apparent, system  100  is modular in that a wide variety of different play elements can be incorporated into the arch-based environment. Depending upon a connection scheme necessary to support the components of a given implementation, arch tabs  106  may or may not be included in system  100 , and may be located within the system in locations other than their positions illustrated in  FIG. 1 . Further, as will become apparent, the precise configuration of arch clamps  105  may vary depending on the component attachment details associated with a given implementation. 
       FIG. 2  is a top plan view of arch-based play system  100 . It should be noted that all dimensions provided herein are intended to be illustrative only. Specific dimensions are provided as an example of scale and are not intended to limit the scope of the present invention in any way. Those skilled in the art will appreciate that the dimensions can easily be adjusted without departing from the scope of the present invention. 
     It should also be pointed out that the positioning of arches relatively to one another as shown and described herein is also illustrative only. A specific configuration is provided as an example of the concept and is not intended to limit the scope of the present invention in any way. Those skilled in the art will appreciate that the arches can easily be otherwise configured without departing from the scope of the present invention. 
     As is shown in  FIG. 2 , the ends of arch assemblies  101 ,  102 ,  103 , and  104  are all positioned in substantial alignment with the circumference of an imaginary circle  107 . Of course, this need not necessarily be the case. The end of one or more arches could just as easily be outside of a common circumference without departing from the scope of the present invention. In one embodiment, certainly not by limitation, the diameter of circle  107  is 40 feet and 10 inches. 
     In one embodiment, certainly not by limitation, a distance  108  between one end of arch assembly  101  and one end of arch assembly  104  is 164 and 13/16 inches. In one embodiment, certainly not by limitation, the distance  109  between one end of arch assembly  104  and one end of arch assembly  103  is 31 and 11/16 inches. In one embodiment, certainly not by limitation, the distance  110  between one end of arch assembly  103  and one end of arch assembly  101  is 93 and 3/16 inches. In one embodiment, certainly not by limitation, the distance  111  between one end of arch assembly  101  and one end of arch assembly  103  is 80 and ⅞ inches. In one embodiment, certainly not by limitation, the distance  112  between one end of arch assembly  103  and one end of arch assembly  102  is 22 and 7/16 inches. In one embodiment, certainly not by limitation, the distance  113  between one end of arch assembly  102  and one end of arch assembly  104  is 165 and ¾ inches. In one embodiment, certainly not by limitation, the distance  114  between one end of arch assembly  104  and one end of arch assembly  102  is 119 and 3/16 inches. In one embodiment, certainly not by limitation, the distance  115  between one end of arch assembly  102  and one end of arch assembly  101  is 33 and ⅝ inches. 
     It is worth emphasizing yet again the modular and adaptable nature of system  100 . The system shown in the Figures is but one of a great number of possible configurations within the scope of the present invention. Configurations can include any number of arch assemblies, and the arch assemblies can be spaced apart as desired. It is also worth mentioning that a beneficial feature of system  100  is that the arch-based system can be expanded in phases by starting with one or more arch assemblies and then adding additional arch assemblies after an initial arch-based play system has been formed. As will become apparent, play elements can be incorporated into the initial system and/or added during any subsequent phase of expansion of the system. In one embodiment, the  FIG. 2  distances  109 ,  112 , and  115  are such that they create a “modular opening” or “attachment point” where play elements can be attached. 
       FIG. 3  is a side view of arch assembly  101 . In this case, clamps  105  have been excluded to show that the arch assembly is actually comprised of separate segments. In one embodiment, one function of clamps  105  is to conceal a connection between segments of the overall assembly. Arch assembly  101  includes segments  101   a ,  101   b ,  101   c , and  101   d . In one embodiment, not by limitation, segment  101   a  has an end-to-end linear distance  201  of approximately 103.5 inches, segment  101   b  has an end-to-end linear distance  202  of approximately 98.75 inches, segment  101   c  has an end-to-end linear distance  203  of approximately 93.5 inches, and segment  101   d  has an end-to-end linear distance  204  of approximately 103.5 inches. Also in one embodiment, not by limitation, the distance  205  between the first end of the arch assembly  206  and the second end of the arch assembly  207  is 230 inches, and the distance  208  between the top of the arch assembly  209  and the bottom of the arch assembly is 105 inches. Although arch assembly  101  is illustrated as including four segments, arch assemblies need not be so limited. An arch assembly can include only one piece (i.e. not segmented), two segments, three segments, four segments (as is shown in  FIG. 3 ), or any number of segments. 
       FIG. 4  is a side view of arch assembly  102 . In this case, clamps  105  have again been excluded. Arch assembly includes segments  102   a ,  102   b ,  102   c , and  102   d . In one embodiment, not by limitation, segment  102   a  has an end-to-end linear distance  210  of approximately 103.5 inches, segment  102   b  has an end-to-end linear distance  211  of approximately 98.75 inches, segment  102   c  has an end-to-end linear distance  212  of approximately 93.5 inches, and segment  102   d  has an end-to-end linear distance  213  of approximately 103.5 inches. Also in one embodiment, not by limitation, the distance  214  between the first end of the arch assembly  215  and the second end of the arch assembly  216  is 230 inches, and the distance  217  between the top of the arch assembly  218  and the bottom of the arch assembly is 105 inches. 
       FIG. 5  is a side view of arch assembly  103 . In this case, clamps  105  have again been excluded. Arch assembly  103  includes segments  103   a ,  103   b ,  103   c , and  103   d . In one embodiment, not by limitation, segment  103   a  has an end-to-end linear distance  219  of approximately 103.5 inches, segment  103   b  has an end-to-end linear distance  220  of approximately 80.5 inches, segment  103   c  has an end-to-end linear distance  221  of approximately 75 inches, and segment  103   d  has an end-to-end linear distance  222  of approximately 103.25 inches. Also in one embodiment, not by limitation, the distance  223  between the first end of the arch assembly  224  and the second end of the arch assembly  225  is 163 inches, and the distance  226  between the top of the arch assembly  227  and the bottom of the arch assembly is 111 inches. 
       FIG. 6  is a side view of arch assembly  104 . Arch assembly  104  includes segments  104   a ,  104   b ,  104   c , and  104   d . In one embodiment, not by limitation, segment  104   a  has an end-to-end linear distance  228  of approximately 104.5 inches, segment  104   b  has an end-to-end linear distance  229  of approximately 135.5 inches, segment  104   c  has an end-to-end linear distance  230  of approximately 130.5 inches, and segment  104   d  has an end-to-end linear distance  231  of approximately 104.5 inches. Also in one embodiment, not by limitation, the distance  232  between the first end of the arch assembly  233  and the second end of the arch assembly  234  is 237 inches, and the distance  235  between the top of the arch assembly  236  and the bottom of the arch assembly is 147 inches. 
     In one embodiment, not by limitation, arch assemblies  101 ,  102 ,  103 , and  104  are manufactured from galvanized steel tubing. Those skilled in the art will appreciate that other materials can be utilized without departing from the scope of the present invention. In one embodiment, not by limitation, arch assemblies  101 ,  102 ,  103 , and  104  have an outer diameter of approximately 5 inches and a wall thickness of approximately 0.120 inches. The cut ends of the steel tubing are illustratively sprayed with a corrosion resistant coating and the exterior surfaces of the arches are illustratively provided with some sort of a finishing coating, such as a powdercoat finishing. It should also be noted that the arch assembly first end to second end distances such as  205 ,  214 ,  223 , and  232  can be varied from the stated distances. In one embodiment, the end to end distances of the arch assemblies are spaced apart by a distance of at least six feet. 
     In one embodiment, all of the bottom arch segments such as  201 ,  204 ,  210 ,  213 ,  219 ,  222 ,  228 , and  231  are the same or similar length despite differences in overall height and lengths of the arch assemblies. This allows for arch clamps to cover the seams of the arch assemblies at approximately the same height. This also facilitates attaching a play element to more than one arch assembly. 
       FIG. 7  is a schematic flow diagram demonstrating one embodiment of an attachment scheme for connecting adjoining arch assembly segments. In step  301 , the end of one arch segment  310  and the end of another arch segment  311  are not attached. In step  302 , end  310  that has an outer-diameter that is smaller than the inner-diameter of end  311 , is partially inserted into end  311  in such a way that a certain portion of  310  represented by the distance  314  in encased by  311 . Also in step  302 , preparation is made to connect ends  310  and  311  with rivets  312  and  313 . In step  303 , rivets  312  and  313  have been driven through the overlapping section  314  and the arch segments are attached. In one embodiment, this or a similar method of attaching adjoining arch assembly segments is employed to attach all adjoining segments shown in  FIGS. 3-6 . 
       FIG. 8A  is a close up side view of a portion  401  of arch assembly  104  ( FIG. 1 ). Arch tabs  106  are attached to portion  401  and are configured to receive an attachment mechanism, such as a mechanism associated with a play element. Multiple (e.g., two) arch tabs located in relatively close proximity to one another illustratively constitute a set  421  of arch tabs. 
       FIG. 8B  is a side view of arch assembly  104  with a clearer depiction of one embodiment, not by limitation, of a distribution of the associated arch tabs. Arch assembly  104  includes multiple sets of arch tabs  421  running along the length of the assembly. Those skilled in the art will appreciate that any arch assembly can include any number of arch tabs, and in any configuration, without departing from the scope of the present invention. 
       FIG. 9  is a perspective view of several different embodiments of arch clamps  105 . Arch clamps  105  can be configured to serve a variety of different purposes within system  100  ( FIG. 1 ). For example, they can be utilized to cover (and secure) the seams between arch segments. Further, they can be utilized to add aesthetic value to the system based on their own appearance and/or by covering any portion of the system having a relatively unappealing visual quality. 
     Each arch clamp  105  illustratively includes two main portions,  510  and  511 , that are configured to be connected to each other utilizing a connection mechanism such as, but not necessarily limited to, screws  512 . Portions  510  and  511  together define an opening  515 . As is illustrated, opening  515  is configured to receive an arch assembly (arch  104  is shown for illustrative purposes) when portions  510  and  511  are secured together. In one embodiment, in this manner, an arch clamp  105  can be firmly secured to an arch assembly. It should be noted that the scope of the present invention is not limited to securing clamps  105  to an arch assembly. Opening  515  can be otherwise configured to support attachment to an elongated member other than an arch assembly (e.g., attachment to a play element added to system  100 , the play element requiring an opening  515  with a different circumference). 
     In one embodiment, as is illustrated, an arch clamp  105  can include one or more connection surfaces  512 . In general, connection surfaces  512  are configured to support a connection between an arch clamp  105  and another element within system  100  (e.g., a play element added to the system). Those skilled in the art will appreciate that surface  512  can be configured to support any of a variety of different attachment schemes. In one embodiment, as will be described in more detail in relation to  FIG. 10 , connection surfaces  512  are configured to support connection to a ball clamp. In accordance with this embodiment, a surface  512 , which is collectively formed by portions  510  and  511 , includes a flat surface with openings to accommodate engagement to one or more attachment mechanisms (e.g., engagement to four screws) associated with a ball clamp. The nature of this engagement will become more apparent upon the description of  FIG. 10  below. 
     In one embodiment, an arch clamp  105  includes two connection surfaces  512 , wherein the plane comprising one surface and the plane comprising the other surface form an approximate right angle relative to one another. In another embodiment, connection surfaces  512  are on opposite sides of the arch clamp  105 . Those skilled in the art will appreciate that a given arch clamp  105  can have one, two, three or more connection surfaces  512  depending upon the need for attachments within a given implementation. 
       FIG. 10  is a perspective view of an embodiment of a ball clamp  600 . Ball clamps are used to connect elements such as (but not necessarily limited to) play elements to arch clamps. In this manner, elements are added to system  100 . Examples of specific elements that can be added to system  100  will be described below in relation to other Figures. 
     A ball clamp  600  illustratively includes two main portions. In one embodiment, a first portion  601  is configured for mounting to a connection surface  512  of an arch clamp  105 . Portion  601  is also configured to receive a ball  611  associated with an element  610 . In one embodiment, not by limitation, portion  601  also includes one or more openings  605 . In one embodiment, an attachment mechanism such as a screw (not shown) is inserted through an opening  605  and engaged to a corresponding opening in an attachment surface  512  so as to secure portion  601  to an arch clamp  105 . Ball clamp  600  also includes a second portion  602  that is configured to receive the ball  611  and to firmly connect to portion  601  utilizing a connection mechanism such as, but not necessarily limited to, screws  603 . Those skilled in art will appreciate that a ball clamp  600  enables a secure connection of element  610  to an arch clamp  105  (i.e., ball clamp  600  is secured to a surface  512  and securely contains a ball  611 ). 
       FIG. 11  is a side view of an arch assembly footing  700  illustratively utilized at each end of an arch assembly (e.g., assembly  101 ,  102 ,  103  or  104 ) in order to secure the structure in the ground. This is but one example of an appropriate footing to which the scope of the present invention is not limited. Footing  700  includes a foot portion  701 . Portion  701  is positioned upon crushed rock  702  (e.g., at least four inches). In one embodiment, portion  702  is encased by a cylindrical concrete footing  703  (e.g., height of at least 30 inches and a minimum diameter of 24 inches). In one embodiment, a protective surface  704  is included in the form of loose-fill material or pour-in-place material. 
       FIG. 12  is a perspective view of an embodiment of a stepping surface  800 . A stepping surface enables a user of system  100  to move from one place to another, for example without touching the ground. Any number of stepping surfaces can be integrated into system  100  without departing from the scope of the present invention. Stepping surface  800  includes two portions. A portion  801  is configured to partially surround an arch assembly (e.g., assembly  101 ,  102 ,  103  or  104 ). A portion  802  is configured to partially surround a remaining portion of the arch assembly. A connection mechanism such as, but not limited to, screws or bolts are utilized to secure portions  801  and  802  to one another, thereby securing the stepping surface to the arch assembly. Stepping surfaces  800  can alternatively be attached to any other element within system  100  (e.g., attached to a play element). Those skilled in the art will appreciate that the opening formed between portions  801  and  802  can be sized to accommodate attachment to any of a variety of different elements. 
     Those skilled in the art will understand that many different types of play elements can be incorporated into system  100 . The scope of the present invention is not limited to any one element or any combination of elements. However, for the purpose of providing a complete description, a broad range of specific examples of element implementations will be provided. The present invention is not limited to any one illustrated example, nor to any combination of illustrated examples. 
       FIG. 13  is a perspective view of a first example of a play element that can be incorporated into system  100 . The play element in  FIG. 13  is a ribbon slide  900 . Ribbon slide  900  includes a curved stepping pole  901 , two crossover bars  902 , two rails  903 , and two attachments  904 . Attachments  904  are illustratively configured to connect to an arch assembly. In one embodiment, attachments  904  are consistent with the attachment scheme described above in relation to  FIG. 10 . In one embodiment, certainly not by limitation, the two ribbon slide rails  903  are substantially parallel and separated by a distance of approximately 12 inches. Stepping pole  901  and rails  903  are illustratively secured to the ground using footings, possibly similar to the footing scheme described above in relation to  FIG. 11 . 
     Ribbon slide  900  can be used in many different ways. For example, one could climb up stepping pole  901  and then work his/her way down to the ground using one or both of the ribbon slide rails  903  for support. In another example, one could use crossover bars  902  as an aid to move onto the slide rails and/or from one arch assembly to another. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 14  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 14  is a winding slide  1000 . Winding slide  1000  includes a stepping pole  1001 , two crossover bars  1002 , a mid-support  1003 , an exit support  1004 , a winding slide panel  1005 , and two attachments  1006 . Attachments  1006  are illustratively configured to connect to an arch assembly. In one embodiment, attachments  1006  are consistent with the attachment scheme described above in relation to  FIG. 10 . Stepping pole  1001 , mid-support  1003 , and exit support  1004  are illustratively secured to the ground using footings, such as footings similar to those described above in relation to  FIG. 11 . 
     Winding slide  1000  can be used in many different ways. For example, one could climb up stepping pole  1001  and then work his/her way down to the ground using winding slide panel  1005 . In another example, one could use crossover bars  1002  as an aid to move onto panel  1005  and/or from one arch assembly to another. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 15  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 15  is a cable rope climber  1100 . Cable rope climber  1100  includes two auxiliary arches  1101 , a cable rope net assembly  1102 , and auxiliary arch tabs  1103 . Also included are attachments  1104 , which are illustratively configured to connect to an arch assembly. In one embodiment, attachments  1006  are consistent with the attachment scheme described above in relation to  FIG. 10 . In one embodiment, auxiliary arches are secured to the ground using footings, such as footings similar to the concrete footing shown in  FIG. 11 . 
       FIG. 16  is a diagrammatic representation of one embodiment, not by limitation, of a connection between an auxiliary arch tab  1103  and a portion of net assembly  1102 . As is shown, the connection scheme involves an engagement between an auxiliary arch tab  1103  and a cable rope climber net assembly end connector  1204 , which is secured by a connection mechanism such as but not limited to the illustrated screw  1205 . In one embodiment, end connector  1204  is illustratively configured to attach to arch tab  1202  in such a way that the end connector is allowed to rotate around the axis of the screw. 
       FIG. 17  is a side view of one embodiment of a turnbuckle assembly for cable rope climber  1100 . Two turnbuckle assemblies are illustratively used to secure cable rope climber net  1102  to the ground. Each assembly illustratively includes a turnbuckle  1301  and a footer portion  1302 . Turnbuckle  1301  is illustratively configured to connect the footer  1302  to net  1102 . Footer  1302  is secured by a footing  1304  (e.g., a concrete footing). In one embodiment, the turnbuckle and footer are covered with loose fill material  1305 . 
     Cable rope climber  1100  can be used in many different ways. For example, one could climb upon cable rope net  1102  and work from one end to the other. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 18  is a perspective view of another embodiment of a play element that can be incorporated into system  100 . The play element in  FIG. 18  is a twisted net  1400 . Element  1400  includes a first twisted net railing  1401 , a second twisted net railing  1402 , footers  1403 , attachments  1407 , and a net assembly  1404 . Attachments  1407  are illustratively configured to connect to an arch assembly. In one embodiment, attachments  1407  are consistent with the attachment scheme described above in relation to  FIG. 10 . In one embodiment, certainly not by limitation, railing  1401  is approximately 92.5 inches long and railing  1402  is approximately 47.75 inches long. In one embodiment, railings  1401  and  1402  include tabs  1405  that run along the length of the railings and are used to attach net assembly  1404  to the railings. In one embodiment, tabs  1405  and net assembly  1404  incorporate an attachment scheme the same or similar to the scheme described above in relation to  FIG. 16 . In one embodiment, each of railings  1401  and  1402  includes a sleeve member  1406  that connects to a footer  1403  to provide additional support. In one embodiment, footers  1403  are similar to the concrete footing described above in relation to  FIG. 11 . 
     Twisted net  1400  can be used in many different ways. For example, one could support his/herself using any or all of railing  1401 , railing  1402  and net assembly  1404 . One could work from one end of net  1404  to the other. This is but one of many examples of play options that will be apparent to those skilled in the art. 
       FIG. 19  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 19  is a climbing net  1500 . A top view of climbing net  1500  is shown in  FIG. 20 . Climbing net  1500  is illustratively integrated into an arch assembly which, for illustrative purposes only, is identified in  FIGS. 19 and 20  as arch assembly  104 . Climbing net  1500  includes arch tabs  1502 , a net assembly  1503 , footers  1504  and footings  1505 . The net assembly  1503  is attached to both arch tabs  1502  and to footers  1504 . In one embodiment, the attachment scheme utilized to connect net assembly  1503  to the arch assembly  104  is the same or similar to the attachment scheme described above in relation to  FIG. 16 . Each footer  1504  is illustratively secured to the ground by footings  1505 . In one embodiment, footings  1505  are the same or similar to the footing described above (e.g., in relation to  FIG. 11  or  FIG. 17 ). Net assembly  1503  is illustratively placed in some degree of tension such that the net is relatively tight and stable. 
     Climbing net  1500  can be used in many different ways. For example, one could go from the ground to the top of an arch assembly, or one could use the element to transfer from one play element to another. These are just two of many play options that will be apparent to those skilled in the art. 
       FIG. 21  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 21  is a climbing rings assembly  1600 . A top view of the element is shown in  FIG. 22 . Climbing ring assembly  1600  is illustratively implemented in relation to two arch assemblies, which, or illustratively purposes only, are identified in  FIG. 21  as arch assemblies  102  and  104 . Climbing rings assembly  1600  includes arch assembly tabs  1602 , rings  1603  and cables  1604 . For each ring, one cable attaches to arch assembly  104 , another cable attaches to arch assembly  102 , and another cable attaches to a footing. In one embodiment, the attachment scheme utilized to connect a ring  1603  via its associated cables is the same or similar to the attachment scheme described above in relation to  FIG. 16 . In one embodiment, the footing beneath each ring is similar to the footing scheme described above (e.g., in relation to  FIG. 11  or  FIG. 17 ). In one embodiment, the lengths of the cables utilized to suspend the rings are chosen such that the rings are aligned in an arch configuration, as is best illustrated in  FIG. 21 . Each ring  1603  is illustratively placed in some degree of tension such that it is relatively tight and stable. 
     Climbing rings assembly  1600  can be used in many different ways. For example, one could go through rings  1603  from one end to the other. Or, one could use the rings assembly to transfer from one play element to another. These are just two of many play options that will be apparent to those skilled in the art. 
       FIG. 23  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 23  is a pipe climber  1700 . Pipe climber  1700  includes two arches  1701  connected by alternating sinusoidal-like crossbars  1702  and by arch-shaped crossbars  1703 . In one embodiment, stepping surfaces  800 , such as surfaces the same or similar to those described above in relation to  FIG. 12 , are included to increase accessibility of the play element. Attachments  1705  are included on the top ends of arches  1701 . Attachments  1705  are illustratively configured to connect to an arch assembly. In one embodiment, attachments  1705  are consistent with the attachment scheme described above in relation to  FIG. 10 . The opposite ends of arches  1701  are configured to attach to a footing, such as a footing the same or similar that described above in relation to  FIG. 11 . 
     Pipe climber  1700  can be used in many different ways. For example, one could use the crossbars to move from the ground to an elevated position in which access to another play element is possible. This is but one of the many play options that will be apparent to those skilled in the art. 
       FIG. 24  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 24  is rope climbing structure  1800 . Structure  1800  includes a climb across auxiliary arch  1801 , auxiliary arch tabs  1802 , a climb across auxiliary arch support  1803 , a net assembly  1804 , and a footer assembly  1805 . The auxiliary arch  1801  includes attachments at each end configured to connect to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described above in relation to  FIG. 10 . In one embodiment, arch  1801  also includes a sleeve  1806  configured to support a connection to one end of arch support  1803 . The other end of arch support  1803  is illustratively secured to the ground using a footing, possibly similar to the footing scheme described above in relation to  FIG. 11 . Arch tabs  1802  run along the length of auxiliary arch  1801  and are configured to support net assembly  1804 . In one embodiment, the connection between auxiliary arch  1801  and net assembly  1804  is accomplished utilizing a tab-oriented connection scheme such as a scheme that is the same or similar to that described above in relation to  FIG. 16 . The bottoms of net assembly  1804  can be connected to footers (e.g., so as to apply a tension to the netting) in any of a variety of different ways that will be apparent to those skilled in the art. Footer assembly  1805  is shown in dots to indicate that it is but one of many alternatives. Footer assembly  1805  eliminates the need for more than two in-ground footings. 
     Rope climbing structure  1800  can be used in many different ways. One could use the net structure to support oneself off from the ground and transfer between play elements without touching the ground. One could also climb the net from the ground, cross over the top of the net, and reach the opposite side. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 25  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 25  is an arched bar structure  1900 . Structure  1900  includes two auxiliary arches  1901  (illustratively but not necessarily the arches are parallel relative to one another), hanging bars  1902  (illustratively but not necessarily perpendicular to and connecting auxiliary arches  1901 ), and footers  1903 . One end of each auxiliary arch  1901  includes an attachment for connection to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described in relation to  FIG. 10 . The other end of each auxiliary arch is configured to attach to a footer  1903 , possibly similar to the footing scheme described above in relation to  FIG. 11 . 
     Arched bar structure  1900  can be used in many different ways. For example, one could support him or herself on top of the auxiliary arches and slide from the top of the structure to the bottom. One could also use the hanging bars to pull oneself from the ground to an elevated position and transfer to another play element. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 26  is a perspective view of another embodiment of a play element that can be incorporated into system  100 . The play element in  FIG. 26  is a hanging bars ladder  2000 . Hanging bars ladder  2000  includes two auxiliary arches  2001  connected to each other by bars  2002 . An attachment is located on each end of the auxiliary arches and enables a connection to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described above in relation to  FIG. 10 . 
     Hanging bar ladder  2000  can be used in many different ways. For example, one can support themselves off from the ground by holding onto the bars and can then cross the distance of the ladder without touching the ground. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 27  is a perspective view of another embodiment of a play element that can be incorporated into system  100 . The element in  FIG. 26  is a pivoting walk-across  2100 . Pivoting walk-across  2100  includes two handrails  2101  and a pivoting assembly  2102 . An attachment is located on one end of each handrail and enables a connection to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described above in relation to  FIG. 10 . Pivoting assembly  2102  includes platform structures  2103 , a pivoting assembly base  2104 , and a seesaw leg  2105 . Platform structures  2103  provide a surface to accommodate standing or sitting and are supported by pivoting assembly base  2102 . The pivoting assembly base  2102  connects to seesaw leg  2105  in such a way as to enable the platform structures to move in an up-and-down in a seesaw-like fashion. The seesaw leg is illustratively mounted to the ground, for example, by way of concrete footing. 
     Pivoting walk-across  2100  can be used in many different ways. For example, children can teeter up-and-down while supporting their feet on the platform structures and supporting their hands on the handrails. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 28  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 28  is a cable-disk climber  2200 . Cable-disk climber  2200  includes an auxiliary arch  2201 , auxiliary arch tabs  2202 , a support bar  2203 , platform cables  2204 , and platform assemblies  2205 . The ends of auxiliary arch  2201  are configured to connect to an arch assembly. In one embodiment, this connection is made in a manner that is the same or similar to the connection scheme described above in relation to  FIG. 10 . Auxiliary arch  2201  includes a sleeve  2206  that is configured to facilitate to support bar  2203 . The auxiliary arch tabs  2202  run along the length of auxiliary arch  2201  and are configured to connect to and support platform cables  2204 . The platform cables  2204  are configured such that one end of each cable connects to and hangs from an arch tab  2202  and the other end connects to a footer in the ground. In one embodiment, the connection between a cable  2204  and arch  2201  is accomplished in a manner that is the same or similar to the connection scheme described in relation to  FIG. 16 . 
       FIG. 29  is a perspective view of an embodiment of a cable-disk climber platform assembly  2205 . Assembly  2205  includes a platform  2301  and a cable bracket  2302 . Platform  2301  includes a platform aperture  2303  that allows platform cable  2204  to pass through the platform. Cable bracket  2304  is attached to cable  2204  and has a surface  2304  configured to support platform  2301 . The platform and bracket are secured together utilizing a connection mechanism such as, but not necessarily limited to, screws  2305 . 
     Cable-disk climber  2200  can be used in many different ways. For example, children can support themselves using the platform cables only and swing from one cable to another. Children could also use both the cables and platform assemblies to support themselves and cross from one end of the structure to the other. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 30  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 30  is a ringed spinner  2400 . Ringed spinner  2400  includes an upper spinner mount  2401 , a ring assembly  2402 , and a footer  2403 . The upper spinner mount includes two bars joined together in a “V” shaped fashion. The two top ends of the “V” each include an attachment for connection to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described in relation to  FIG. 10 . The bottom end of the “V”, portion  2404 , is configured to support the ring assembly in such a way as to allow the ring assembly to rotate. The ring assembly includes two ring shaped structures  2405  attached by a middle bar  2406 . The ring assembly bottom end  2407  and footer  2403  are configured to be secured together in such a way that the ring assembly can rotate. 
       FIG. 31  is a diagrammatic representation of one embodiment, not by limitation, of a connection between a ring assembly bottom portion  2407  and a ring assembly footer element  2403 . Portion  2407  illustratively includes a spiral retainer groove  2501 . Footer  2403  includes a spiral retainer  2502 . In one embodiment, retainer  2502  is inserted into groove  2501  and the bottom ring assembly portion and ring assembly footer are secured together utilizing bushings  2503 . 
       FIG. 32  is a side view of a ringed spinner footing  2600  illustratively utilized to support the end of a ringed spinner in order to secure the structure to the ground. This is but one example of an appropriate footing to which the scope of the present invention is not limited. In footing  2600 , the ring assembly bottom  2407  and ring assembly footer  2403  are secured together and are tilted at an angle  2601  (e.g., eighty degrees) from the surface of the ground. Footer  2403  is encased by a cylindrical concrete footing  2602  (e.g., height of at least 20 inches and a minimum diameter of 12 inches), and footing  2602  rests upon crushed rock  2603  (at least 3 inches). In one embodiment, the concrete footing is covered with loose fill material  2604 . 
       FIG. 33  is a diagrammatic representation of one embodiment, not by limitation, of a connection between a ringed spinner upper spinner mount  2401  and ring assembly  2402 . The connection secures the two components together while allowing the ring assembly to rotate. Ring assembly  2402  includes a spherical attachment  2701  that is enclosed by bushings  2702 . Bushings  2702  are configured to receive a screw on the outer portion  2703 . Upper spinner mount  2401  is configured to receive a screw at portion  2704  and to receive the bushings at portion  2705 . The bushings with the spherical attachment enclosed is inserted into portion  2705  and secured to the spinner mount by a connection mechanism such as but not limited to the illustrated screw  2706 . It should be noted that the connection scheme shown and discussed above in relation to  FIG. 31  is somewhat similar to that shown in  FIG. 33 . In one embodiment, either scheme can be used in either case (i.e., both schemes will work for both elements). 
     Ringed spinner  2400  can be used in many different ways. For example, one could stand on the ground and spin the ring assembly around. One could also support him or herself on the ring assembly and rotate back-and-forth. These are simply two of many play options that will be apparent to those skilled in the art. 
       FIG. 34  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 34  is a spiral spinner  2800 . Spiral spinner  2800  includes an upper spinner mount  2801 , a spiral assembly  2802 , and a footer  2803 . The upper spinner mount includes two bars joined together in a “V” shaped fashion. 
     The two top ends of the “V” each include an attachment for connection to an arch assembly. In one embodiment, the attachments are consistent with the attachment scheme described in relation to  FIG. 10 . The bottom of the “V”, portion  2804 , is configured to support the spiral assembly in such a way as to allow the spiral assembly to rotate. The ring assembly bottom end  2805  and footer  2803  are configured to be secured together in such a way that the spiral assembly can rotate. In one embodiment, end  2805  and footer  2803  are secured together in a manner that is same or similar to the scheme described above in relation to  FIG. 31 , and the footer is mounted in a manner that is same or similar to the scheme described above in relation to  FIG. 32 . Also in an embodiment, upper spinner mount  2801  and spiral assembly  2802  are secured together in a manner that is same or similar to the scheme described above in relation to  FIG. 33 . 
     Spiral spinner  2800  can be used in many different ways. For example, one could stand on the ground and spin the ring assembly around. One could also support him or herself on the ring assembly and rotate back-and-forth. These are simply two of many play options that will be apparent to those skilled in the art. 
     In addition to play elements attached to one or more arch assemblies, an arch-based play system may also include additional play elements in the environment that are not necessarily attached to an arch assembly. These “unattached” play elements contribute to creating a continuous and innovative play system. Several illustrative embodiments of such play elements are described below. 
       FIG. 35  is a perspective view of an example of an “unattached” play element that can be incorporated into system  100 . The play element in  FIG. 35  is a talking post  2900 .  FIG. 36  is a side view of a bottom portion  2950  of talking post  2900 . Talking post  2900  includes a talking ball  2901 , a talking ball plate  2902 , a talking tube hose  2903 , and a post  2905 . The bottom of the talking post  2906  is positioned upon crushed rock  2907  and is encased in a cylindrical concrete footing  2908 . In one embodiment, concrete footing  2908  is covered by a covering  2910 . 
     Talking post  2900  includes an aperture  2912  located above the concrete footing in which talk tube hose  2903  can exit. Talking ball plate  2902  includes openings in the plate  2913  to permit sound waves to enter and leave the talking tube hose, and also includes apertures  2914  so that the plate can be secured to the talking ball utilizing a connection mechanism such as, but not necessarily limited to, screws or bolts (not shown). 
     In one embodiment of a talking post, a stepping surface  800  is secured to a talking post. In another embodiment, two talking post share a talk tube such that sound waves can travel from one talking post to the other. Talking post  2900  can be used in many different ways. For example, if two talking posts share a talk tube, users can speak into one talking post and be heard at the other. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 37  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 37  is a cycler  3000 . Cycler  3000  includes a cycler post  3001  and two handhold assemblies  3002 .  FIG. 38  is an exploded view of an embodiment of a cycler handhold assembly  3002 . Handhold assembly  3002  includes a shaft  3003 , a crank  3004 , bushings  3005 , and handles  3006 . Handhold assemblies  3002  are mounted in such a way that the handles can be rotated in a manner similar to as how bicycle pedals are rotated. In one embodiment, the bottom of the talking post sits upon crushed rock and is encased in a cylindrical concrete footing. 
     In one embodiment, a stepping surface  800  is attached to cycler post  3001  in such a manner that the stepping surface surrounds the cycler post, and that a child can stand on the stepping surface. Cycler  3000  can be used in many different ways. For example, a child can stand on an attached stepping surface and rotate the handhold assemblies with his/her hands. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 39  is a perspective view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 39  is a curved post  3100 . Curved post  3100  includes a post member  3101 . In one embodiment, post member  3101  is constructed from an aluminum tube. In one embodiment, the curved post sits upon crushed rock and is encased in a cylindrical concrete footing. 
     In another embodiment, the curved post includes one or two stepping surfaces  800  attached to post member  3101 . These stepping surfaces could be used to stand on, and elevate from the ground when playing with the curved post. Curved post  3100  can be used in many different ways. For example, a user can hold onto the post and rotate around the post. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 40  is an exploded view of another example of a play element that can be incorporated into system  100 . The play element in  FIG. 40  is a spring bench  3200 . Spring bench  3200  includes a platform  3201  upon which children can support themselves. In one embodiment of a spring bench, platform  3201  has the approximate shape of two circles joined with one of the circles being larger than the other. Platform  3201  is supported by two spring assemblies  3202  that allow the platform to move in a manner consistent with spring action such as oscillating and dampening. 
     Spring bench  3200  can be used in many different ways. For example, a user can sit on the platform and bounce up-and-down or swing from side-to-side. This is but one of many play options that will be apparent to those skilled in the art. 
       FIG. 41  is a perspective view of an embodiment of an arch-based play system  3300 . System  3300  combines many of the components discussed above. System  3300  includes four arch assemblies  101 ,  102 ,  103 ,  104 , arch clamps  105  (an illustrative two are identified in  FIG. 41 ), ball clamps  600  (an illustrative one is identified in  FIG. 41 ), spring benches  3200 , a pipe climber  1700 , stepping surfaces  800  (an illustrative two are identified in  FIG. 41 ), curved posts  3100 , a climbing net  1500 , a winding slide  1000 , climbing rings  1600 , a cable-disk climber  2200 , and a cable rope climber  1100 . It is worth noting that system  3300  is a composite play structure. A composite play structure is two or more play structures attached or functionally linked, to create one integral unit that provides more than one play activity. 
     System  3300  provides numerous routes in which children can go almost seamlessly from one play element and experience to another. This variety of routes and continuity in play provides an alternate experience to children accustomed to the “post and deck” style of other play systems. An example of a route is that a child could start on the spring benches, travel from the end of the pipe climber towards the center of system, transfer from the pipe climber to the stepping surfaces below, travel from the stepping surfaces to the curved post, travel from the curved post to the climbing net, travel across the climbing net and transfer to the climbing rings, crawl through the climbing rings, and finally slide down the winding slide. Many, many other potential routes exist in the system in which the child can go from one play experience to another without interruption. 
       FIG. 42  is a perspective view of an embodiment of an arch-based play system  3400 . System  3400  includes eight arch assemblies  101 ,  102 ,  103 ,  104 , arch clamps  105  (an illustrative two are identified in  FIG. 42 ), a winding slide  1000 , two twisted nets  1400 , a cable-disk climber  2200 , two climbing rings assemblies  1600 , a ringed spinner  2400 , cable rope climber  1100 , spring benches  3200  (an illustrative one is identified in  FIG. 42 ), a climbing rings assembly  1600 , two talking posts  2900 , a cycler  3000 , a curved post  3100 , an arched bar structure  1900 , two climbing nets  1500 , a pivoting walk-across  2100 , a rope climbing structure  1800 , and a pipe climber  1700 . 
     Similar to system  3300 , system  3400  provides a wide variety of routes in which to transfer from one play element to the next. Also like in system  3300 , this large variety of routes creates an entirely new play experience for children. An example of a play route in system  3400  is that a child can climb up the arched bar structure, jump onto a curved post, hop to a spring bench, grab onto the adjacent climbing net and work his or herself across, jump on to a talking post, transfer to the spring bench, pull his or herself into the climbing rings and climb through, pull his or herself across the adjacent twisted net, transfer and cross the climbing net, grab onto a pipe climber bar and climb his or herself back down to the ground. 
     It should be noted that systems  3300  and  3400  are only example configurations. The arch-based play system components such as, but not limited to, arch assemblies, arch clamps, ball clamps, and play elements can be used to create many possible configurations of the arch-based design. 
     Further, it should be pointed out that the arch-based system can be implemented in phases. For example, an initial system may only have two arches. An additional two arches can be added subsequently to enable different designs within the environment. Also, any number of arches could be added to the system to enable even more possibilities. The entire system is completely extensible, and the arch assemblies are the core of that extensibility. 
       FIG. 43  is a perspective view of an arch assembly and an imaginary circle. Arch assembly  103  lies in the same plane as the plane created by the three arch clamps  105 . Imaginary circle  3501  is perpendicular to the arch assembly plane. The diameter of the circle is the distance  223  between the first end of the arch assembly  224  and the second end of the arch assembly  225 . Ends  224  and  225  lie on opposing sides of the circumference of circle  3501 . In an embodiment, all arch assemblies in a play system each lie in their own plane and have imaginary circles. The imaginary circles are perpendicular to the plane of their associated arch and have diameters equal to the distance between the first end of the associated arch and the second end of the associate arch. In one embodiment, the imaginary circles formed by arch assemblies in a play system all lie in the same plane. In another embodiment, the imaginary circles formed by arch assemblies in a play system lie in different planes (i.e. arch assembly planes are not perpendicular to the ground). 
     It is worth noting that in an embodiment such as that shown in  FIG. 43 , play elements can be attached to an arch assembly and extend beyond the arch assembly&#39;s imaginary circle. For example, play element  1700  in  FIG. 41  extends beyond the imaginary circles of the arch assemblies  101  and  103 . Similarly in  FIG. 41 , play elements  1000 ,  1100 , and  2200  extend beyond the imaginary circles of their attached arch assemblies. 
       FIG. 44  is a top view of two arch assemblies and their imaginary circles. Arch assembly  103  has its imaginary circle  3501 , and arch assembly  104  has its imaginary circle  3502 . It is noteworthy that circles  3501  and  3502  overlap (i.e. they share some area in common). The overlapping area is labeled  3503 . In an embodiment, two or more arch assemblies in a play system have imaginary circles that are perpendicular to the arches and the imaginary circles of each arch at least partially overlap such that there is an area common to all imaginary circles. In another embodiment, the imaginary circles are not in the same plane and the overlapping area between the two imaginary circles is more or less a line. 
       FIG. 45  is a top view of four arch assemblies and their imaginary circles. Arch assembly  103  has its imaginary circle  3501 , arch assembly  104  has its imaginary circle  3502 , arch assembly  101  has its imaginary circle  3504 , and arch assembly  102  has its imaginary circle  3505 . It is noteworthy that circles  3501 ,  3502 ,  3504 , and  3505  overlap (i.e. they share some area in common). This overlapping area is labeled  3506 . 
       FIG. 46  is a perspective view of an arch assembly  104  and an imaginary line  3601 . Line  3601  is tangential to the arch assembly  104  at the ball clamp attachment point  105 . The imaginary line  3601  is not perpendicular to the ground. It is angled. This illustrates that at the attachment point the arch is at an angle other than perpendicular. 
     It is worth noting some of the functionality of some of the features already discussed. Some of the features of embodiments disclosed are arch assemblies having an incomplete circle or oval shape, arch assemblies of different heights, arch assemblies at angles other than parallel or perpendicular to each other, arch assemblies orientated towards each other such that they have overlapping imaginary circles, arch assemblies where attachment points are at arch locations that are not perpendicular to the ground, overlapping arch assemblies, and arch assemblies having end to end distances spaced apart by a distance of at least six feet. All of these features, and others not listed, contribute utility to play systems. Many of the features in addition to having utility when used alone, also contribute additional utility to a system when used in combination. For example, the incomplete circle or oval shapes such as those shown in  FIGS. 19-22  utilize the shape to create the layout and size of play environments. The end to end distance of at least six feet allows for play environments such as those shown in  FIG. 28  and allows for people to pass under the arch assemblies. The overlapping arch assemblies and overlapping imaginary circles allow for play elements to be located proximate to each other such that a user can pass from one play element to another, and also for play elements to be attached to more than one arch assembly. Arch assemblies with different heights and arches at angles other than perpendicular allow for play elements to be attached to more than one arch and allow for play elements to be located proximate to each other such that a user can pass from one to another. Attachment points at arch assembly portions not perpendicular to the ground allow for better accessibility to play elements by allowing multiple play elements to be located proximate to each other such that a user can easily pass from one play element to another. The not perpendicular attachments also facilitate attaching a play element to more than one arch assembly. 
     Although the arch-based play system has been described with reference to particular embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.