
Let's Play In So Many Ways! A 3-In-1 Montessori Box That Grows With Your Baby From 4 To 12 Months.. Our starter set teaches the child that an object is still there even though she cannot see it through Piaget's Theory of Object Permanence. The lids and parts can be changed to suit 3 different play patterns that progressively learn this theory: a ball drop using a half lid, a ball drop using a full lid, and a coin drop.. Our Montessori Boxes Are. Modular - a modular box that can be used over and
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