4-group Number Blocks™
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One set contains 30 blocks, in the primary and secondary colors. Each number comes in various colors so that children recognize a 4-group Number Pattern by its shape and not by its color.
Store the blocks where your child can play with them alone or with friends. Block play builds children's problem solving and spatial skills, as well as their imaginations and creativity. The child's job is to experiment and create using her own ideas.
Read the Directions here.