• Zero gravity test: adjusted to the highest bouncing ball, improves hand-eye coordination. Used by athletes as a sports training ball. Great sensory ball for kids. • Unique sound: comfortable to hold and throw, fun sensory ball for all ages. Craters that produce a striking sound with each bounce. • Durable material: made of high-density polyurethane, extremely durable and highly elastic. Withstands endless bounces, suitable for sports, indoor and outdoor games. • Easy to control: 6.8 cm diameter, lightweight, elastic, and soft, easy to grip and control without harming fingers or hands. • Good gift: attractive and fun for all ages, from toddlers to adults. Loved by dogs, suitable as a party gift and for friends and loved ones.