A brand new challenge from the team that brought you the Rubik's Cube. Can you manipulate the clear sphere to get the colored balls into their proper location? It's not as easy as it looks! Both spheres have a weight opposite their holes. These weights means gravity ensures the holes will remain above the axis of rotation, and the balls will be below it. By understanding how the axis of rotation in each sphere works, you can overcome the force of gravity and invert the sphere to allow the balls to drop through the holes. Ages 8 and up.