Fun To Play:It will keep you trying for hours. The ball is the perfect size for handling comfortable in adults hand. The colorful buttons are easy to push. The material used to make the ball is very durable and will last. Solving It: Theres one empty circle and you push the colored balls around utilizing the empty space to match the color of the ball with the ring outside the circle. Theres a sponge center in the ball that allows the colored balls to slide from one space to the next when you press on them. Mixed Again: mix it up the same way you solve it. Randomly start moving the pieces around until they are all mixed up. You can strategically place the away from their home to make it harder. Fun \u0026 Joy: Good for all ages. It will keep you trying for hours. Important activities to teach kids to work hard at solving complex problems and enhance a childs memory.