?Fisher-PriceAt last...the ring to top them all.This Fisher-Price® Rock-a-Stack® toy, made from plant-based materials*, offers classic stacking fun for babies. It features a wibbly-wobby rocker base and 5 colorful rings for little hands to grasp and stack. Stacking helps baby develop hand-eye coordination and introduces them to the concept of relative size as they learn to sort and stack from biggest to smallest!Classic stacking toy with 5 colourful rings and a bat-at rocker base.Made with plant-based materials (*Toy made from a minimum of 90% ethanol extracted from sugar cane. ) and comes in FSC certified package.Helps introduce the concept of relative size as baby stacks the rings from biggest to smallest.Grasping and stacking the rings helps develop fine motor skills and problem-solving skills.6+ months