Magically Expands from 5.5" to 12" Award Winning geometric expanding/contracting ball. Educational object of art M1301 Features: -Sturdy long lasting plastic. -Includes activity sheet for 21 Cool Things to Do. -Includes hanging device and instruction for hanging as a mobile. -Rainbow of primary colors. Gender: -Boy/Girl. Category: -Physical Skills. Minimum Age Requirement: -2 Years And Up. Dimensions: Overall Height - Top to Bottom: -7 Inches. Overall Width - Side to Side: -7 Inches. Overall Depth - Front to Back: -6 Inches. Overall Product Weight: -5 Pounds. 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, and 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; you could also call it a Bucky Ball, but either way, 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. And it's so aesthetically pleasing that Mom or Dad may swipe it for a desk ornament. --Richard Farr
My six year old son wanted one of these for a while now. I ordered this one for him for Christmas and he loves it. I like the smaller size, but now he says he wants the big one that he has always wanted. I opted for the small and am glad I did because I personally think this is plenty big for him to toss around and play with in our house.