The Hoberman Mini Rainbow Sphere is an expanding and contracting ball. It cleverly combines mathematics and geometry to create a surprising motion that fascinates children and adults alike.Why not give these tricks a try?Flip DownHold the closed Sphere by one hub on top of your open palm. Flip the Sphere over and watch it open, then flip it back to the top of your palm and let it close. When youve mastered this, try it with your other hand.Open BounceHold the Sphere fully open with two hands and throw it down to the floor. If you spin it towards you, it will bounce back.Two-Handed Open-to-Close SpinHold the opposite hubs of an open Sphere between your thumbs and first two fingers. Using your thumbs, twirl the Sphere backwards as you close it and push in so the hubs are spinning on the palms of your hands. This takes practice, but looks really cool.Floor SpinOpen the Sphere and place it on the floor. Holding the upper hub, spin the Sphere and watch it move. Try spinning it on a hub, then a triangle, then a pentagon notice the different way it moves on each of these shapes.