Put their addition skills to the test with this IcoSoKu 3-D Puzzle. The idea behind this brainteaser, is to get all of the dots on the triangle pieces to add up to the sum of the number on the yellow buttons. Game on! More$5.49 Flat Rate Shipping! Free shipping on $125+. Orders placed by 2:00 PM CST ship the same business day! (Mon.-Fri.)
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