A set of soft rubber stacking balls with a water spray function, sized at 21.5cm, offers young children a hands-on way to build coordination and explore cause and effect. Each box contains 72 pieces, with each item presented in a window box for easy display. Designed for infants and toddlers aged 0 to 3 years, these balls can be stacked for play or used with water for sensory fun. This product is sold wholesale by the box. Options: Educational, 21.5 cm.