Promote early learning via play with a thoughtfully designed stacking ring that teaches size and order. Each assorted colored ring is easy to grasp and stack, while improving fine motor development and spatial skill. The center rod is designed to fold for safety. Made from sustainably harvested rubberwood and non-toxic water based colors, PlanToys baby toys are both safe and functional. There is no assembly just stack and learn. PlanToys is a world leader in eco-friendly innovation and award winning baby toys. Each of the rings is one step of many into building a child's confidence in their growth.