Material:Plastic Feature:Colorful and magic design is attractive to kids,It can stretch after throwing out,and will shrink when the power wear out,pull or press the ball parts, also can become larger or smaller; The baby can use kick, have it as a play, play out bigger then decrescent. Also can be as decoration in house Note:Not Suitable for Kids under 3 Years Size:Shrink diameter:about 17cm,after stretching is about 32cm