The colorful Hoberman Mini Sphere comes out of the box looking like a futuristic Christmas tree ornament.
It's a cross between a ball and a star & measures 5.5 inches across. But pick it up by any one of its dozens of plastic points & this amazing little feat of engineering, or imagineering, expands neatly into a lattice like globe that's 12 inches in diameter.
The inventor calls it a trapezoidal icosatetrahedron. It's 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.