Fisher-Price Rock-A-Stack 5 colorful rings, perfect for grasping and stacking Bat-at rocker base Top ring has shiny surface with rattling beads inside Introduces babies to relative size and stacking
Fisher-Price Brilliant Basics Rock-a-Stack
Think, stack, and play.
While they're stacking the rings on the base from biggest to smallest, babies are starting to understand the concept of relative size. (Plus, it's super fun.)