Bouncing on a Gymnic Hop 66 promotes balance and coordination in children while providing a fun workout. The Hop 66 Ships uninflated so parents can adjust the level of inflation according to the size and age of the child; includes 1 valve and 1 Plug. Patented handgrip ensures safe bouncing; inflated ball measures 26" in diameter and has a maximum sustainable weight of 160 pounds. Made from soft, super-strong, latex-free bands, BPA-free and phthalate-free vinyl for years of worry-free enjoyment. Suitable for children ages 6 and up