· Bouncy Balls for Kids - The hopper ball includes a pump so that you can easily inflate the bouncing ball on your own. · Bounce, Bounce, Bounce - The handles on the yellow bounce ball are durable and easy to grip. The smiley face makes the ball all more exciting. · Ball - The ball measures 20" in diameter when fully inflated. Recommended for ages 7-10 years. Hours of fun are guaranteed with this hop ball. · Exercise Fun - Get your kids to burn extra energy and learn to balance, all while having a fun and exciting time. · Balance Ball - The ball is made with quality construction to last years. The bouncing ball is safe enough to use indoors and durable enough for outdoor use.