The Object Permanence Box is a fun and educational toy for your baby. It exercises precise hand movements and develops hand, wrist and finger control. These refined hand movements also develop hand-eye coordination in your little one while experiencing object permanence. It promotes early childhood curiosity and sends brain signals that a goal has been achieved. After showing your baby how to play, let them explore on their own for hours. Made of natural wood, non-toxic colors and smooth edges, safe for babies and toddlers. The wooden box contains 3 neutral colored balls.