Powered by the sun, and bounces as high as a volcano! The Waboba Lava Ball is a hyper bouncing ball with a super high bounce, and features a cool textured surface with lava cracks and craters that change color in the sun! Hit up those sunny UV rays and watch the yellow cracks change to red right before your eyes in your backyard. Then watch this color-changing sensation bounce sky-high on a playground, sidewalk, street, or even the gymnasium. Take your street games to the next level with this super bounce ball. Plus, the Lava Ball can helps improve hand-eye coordination. Use it as a sport training ball for basketball, baseball, cricket, and even hockey. Loved by people of all ages. 65mm in diameter.