Hoberman Mini Sphere

Chuck Hoberman calls it a trapezoidal icosatetrahedron; a fascinating exercise in complex simplicity. The structure is rigid enough to roll and throw, yet if touched in the right way, it will suddenly collapse again, curling in on itself like a defensive hedgehog. An enclosed pamphlet describes various tricks you can do--if you're prepared to practice For kids age 4-104 Magically unfolds from 5.5" to 12"