A brand new series of interactive board books to make it easier for children to learn math skills. Slide the simple mechanisms and see the picture change to show the result of the additions and subtractions, making math visual, concrete, and easy to understand!

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Shakespeare Book House
IL, U.S.A.

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Order quantity	3 to 5 business days	2 to 4 business days
First item	US$ 3.99	US$ 8.99

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