Puzzle Collection > 3D Jigsaw Puzzle - Three Layers
- Name: 3D Jigsaw Puzzle - Three Layers
- Manufacturer: Crystal Lines (imported to the USA by Binary Arts - now known as ThinkFun)
- Year: 1992
- Object: The hidden farm is a 3D jigsaw puzzle. It consist of three layers and the two upper layers have transparant jigsaw puzzle pieces. The total number of pieces is 450. The puzzle is designed by Australian physicist Dugald Keith.