Hedgehog in a cage, one of the many options.
Two Hedgehog in the exhibition.
Hedgehog in a cage ( czech. Ježek v kleci ) is a mechanical puzzle , popular in the Czech Republic , occupies a central place in the book The Mystery of the Puzzle ( Zahada hlavolamu ) "Slum Trilogy" adventure stories by Yaroslav Foglar . The puzzle consists of a small ball with protruding spikes of various lengths located in a cylinder with holes of different sizes. The essence of the puzzle is to pull the ball (hedgehog) out of the cylinder (cage).
See also
- Mystery puzzle
- Jaroslav Foglar