This best-selling balance ball is now available in two sizes! Kids size (45cm) for kids ages 5-8 and a Junior size (52cm) for kids ages 8-12 or anyone who may need a little extra height. Also, features four built-in soft stabilizing legs so it won’t roll away when not in use. Encourages kids to learn and practice healthy posture while benefiting from active sitting and helps to increase focus by keeping the body active and the mind engaged simultaneously. The constant ball movements increase blood flow to the brain, leading to better focus and concentration. Box also includes easy-inflation pump. Setup, Usage Tips and Care and Safety Guide to get you started!