The crowning ring has arrived at last. Baby's stacking enjoyment is provided by this Fisher-Price Rock-a-Stack toy, which is constructed of plant-based ingredients. It has a wobbly-wobbly rocker base and five vibrant rings that are easy for young hands to hold and stack. As a newborn learns to sort and arrange items from biggest to smallest, it helps them to build hand-eye coordination and introduces them to the idea of relative size. (Toy made from at least 90% ethanol derived from sugar cane.)

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