Features: HIGH QUALITY: Made from plastic and spring, durable for daily use and healthy for kids to play with. PROPER SIZE: The diameter of the ball is 7cm / 2.8in. It is just the perfect size to hold in hand. It just takes up a very small space, so it is convenient to carry. NOT EASY TO DEFORM: With inside sponge of high elasticity, the ball is not not easy to deform even after pushing for so many times. SOLID STRUCTION: The small colorful balls are embedded in the big ball. So it is not easy to fall apart even it falls off from a high place. FUN TO PLAY: The way to play with this ball is simple and fun. Just push the colorful ball into the right place with the same color of it, then you made it. You can have fun with this ball all day long.