Ball jumping race diameter big size hop ball is perfect for children and makes it easy to take along or store anywhere. The durable vinyl material means you will be able to hop almost anywhere and the hopper ball will stay inflated and bouncy. Now hop like a bunny to race with friends Hedstrom hopper balls improve coordination, balance, and exercise. This Is one of the best toys for children's exercise and because kids can hop either inside or outside this is a must-have toy for any child, available on Rental!