Construction game with various sizes gears for a spectacular chain reaction; everything starts moving as soon as the crank is turned. You learn, while having fun, some simple mechanics principles and you discover extraordinary optical effects.
Contains
- 4 Large gears
- 4 Medium gears
- 4 Small gears
- 13 Interlocking plates
- 4 Stickers for large and 2 for medium gears
- White pins and crank
