Get ready to stack! A new twist on the classic infant stacking toy, Stack-a-Roos lets your child stack pieces together to create a fun and adorable new animal friend! Made of soft, durable plastic,? Stack-a-Roos are designed to help develop necessary skills like hand-eye coordination, sensory exploration & fine motor skills. Watch your childs face ?ll with delight when they stack the pieces in the correct order and are rewarded with the base lighting up and triumphant music.