1966

== Events ==
* The number of countries in which LEGO products were sold reached 42.
* The 1x4x2 lattice fence and 1x4x2 lattice gate bricks were introduced.
* The 1x1 round brick was updated to feature a tapered base, allowing easier disassembling.
== Themes introduced or discontinued ==
* Train was introduced.
== Sets introduced ==
{|width="100%"		
=== ===
* 003 Master Mechanic Set
* 004 Master Builder Set
* 021 Wheel Set
* 042 Jumbo Brick Pull Toy
* 057 4 Large Wheels
* 058 8 Small Wheels
* 061 10x20 Baseplate
* 062 10x20 Baseplate
* 063 10x20 Baseplate
* 064 10x20 Baseplate
* 070 Universal Building Set
* 100 Motor with Wheels and Wire
* 101 4.5V Battery Case
* 111 Starter Train Set without Motor
* 112 Locomotive with Motor
* 113 Motorized Train Set
* 114 Small Push Train Set
* 115 Starter Train Set with Motor
* 120 Small Basic Set
* 150 Straight Track
* 151 Curved Track
* 152 Two Train Wagons
* 153 Large Train Wagon
* 205 Starter Set
* 238 Idea Book
* 239 We Build With LEGO
* 285 Medium Basic Set
* 301 Wheel Toy Set
* 313 London Bus
* 316 Farm Tractor
* 325 SHELL service station
* 375 Deluxe Basic Set
* 400 Small Wheels with Axles
* 401 Large Wheels with Axles.
* 414/1R No. 1 Assorted Windows, Red
* 414/1W No. 1 Assorted Windows, White
* 414/2R No. 2 Assorted Windows, Red
* 414/2W No. 2 Assorted Windows, White
* 414/3R No. 3 Assorted Windows, Red
* 414/3W No. 3 Assorted Windows, White	
=== ===
* 414/4R No. 4 Assorted Windows, Red
* 414/4W No. 4 Assorted Windows, White
* 414/5R Doors, Red
* 414/5W Doors, White
* 415 16 Stud Beams, Assorted Colors
* 415 16 Stud Beams, Assorted Colors
* 416 20 Stud Beams, Assorted Colors
* 416 4 Sixteens 2 Twenties
* 417 4 x 4 L-Shape Bricks
* 418 2 x 4 Bricks 
* 419 2 x 3 Bricks
* 420 2 x 2 Bricks 
* 421 1 x 2 Bricks
* 421 2 eights 2 sixes 2 fours 8 twos 6 ones
* 422 1 x 1, 1 x 2, 1 x 4, 1 x 6, 1 x 8 Bricks
* 423 Curved Bricks and Cylinders
* 424 Curved Bricks, Assorted Colours
* 425 6 & 8 Stud Beams, Clear
* 425 6 & 8 Stud Beams, Assorted Colours
* 426 7 Named Beams
* 426 Names, Numbers, Alphabet
* 427 8 pieces 2 x 8 
* 428 5 pieces 4 x 8
* 429 4 pieces 6 x 8
* 430 Six Trees and Bushes
* 430 Assorted Trees, Bushes, Flags
* 431 Gas Station
* 432 Road Signs
* 434 50 lettered bricks
* 435 Garage Plate and Door
* 451 1 x 6 x 3 Window, Red or White
* 452 1 x 6 x 2 Window, Red or White
* 453 1 x 6 x 2 Shuttered Windows, Red or White
* 454 1 x 4 x 2 Window, Red or White
* 455 1 x 3 x 2 Window, Red or White
* 456 1 x 2 x 2 Window, Red or White
* 457 1 x 1 x 2 Window, Red or White	
=== ===
* 458 1 x 2 x 1 Window, Red or White
* 459 1 x 1 x 1 Window, Red or White
* 460 1 x 2 x 3 Door, Red or White
* 461 Windows and Doors, Retailer Pack
* 462 2 x 8 Plates, White
* 463 4 x 8 Plates, White
* 464 6 x 8 Plates, White
* 470 1 x 1, 1 x 2, 2 x 2, 2 x 3, 2 x 4 Plates
* 471 Tiles
* 480 Sloped Bricks, Regular, Peaks, Red
* 480 Sloped Bricks, Regular, Peaks, Blue 
* 481 Sloped Bricks, Gables, Corners, Red 
* 481 Sloped Bricks, Gables, Corners, Blue 
* 482 Slopes and Slopes Double 2 x 2, Red
* 482 Slopes and Slopes Double 2 x 2, Blue
* 485 electrical brick
* 486 Extra Bulb for 485
* 487 1x1 bricks with numbers
* 488 1 x 1 Bricks with Letters
* 489 traffic signs
* 490 trees and bushes
* 491 SHELL station brick and sign
* 492 Nordic flags
* 493 Flags of Europe
* 509 38 Slimbricks Assorted Sizes (Red, White, Blue, Yellow, Clear or Black)
* 601 Morris Marina 1100
* 615 Samsonite Gift Set
* 649 Mercedes Shell Tanker
* 657 Long Covered Van dual wheels
* 695 6 European Cars
* 696 6 German Cars
* 700 10 x 20 Brickplate
* 820 Wood Playbox Full, Large
* 821 Wood Playbox Empty, Large
* 822 820 Wood Playbox Full, Meduim
* 823 Wood Playbox Empty, Medium
* 835 Advanced Builders Set
 
Category:Years