Hedgehog in the Cage facts for kids
Hedgehog in the Cage (in Czech: Ježek v kleci) is a mechanical puzzle popular in the Czech Republic which features prominently in the "Dobrodružství v temných uličkách" (Adventures in the Dark Alleys) trilogy of adventure stories by Jaroslav Foglar. The puzzle consists of a small sphere with protruding spikes of various lengths contained within a cylinder perforated with holes of different sizes. The challenge posed by the puzzle is how to release the sphere (the hedgehog) from the cylinder (the cage).
Images for kids
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The first known model of the puzzle, patented by Clarence A. Worrall.
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The masked "Supreme Vont" alias "Široko" (Shiroco), holding the Hedgehog in the Cage. A screenshot from the TV series Záhada hlavolamu about Rychlé šípy club (1969).
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Hedgehog in the Cage Facts for Kids. Kiddle Encyclopedia.