The colorful "Hoberman Mini Sphere" comes out of the box looking like a futuristic Christmas tree ornament.
It's a cross between a ball & a star & measures 5.5 inches across. But pick it up by any one of its dozens of plastic points and 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 & 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.
And it's so aesthetically pleasing that Mom or Dad may swipe it for a desk ornament