SumBlox offer a unique way of learning through play. Set includes 76 beechwood blocks and 80 activity cards. Each block's size is reflective of its numerical value. Seeing the mathematical problems take physical shape helps the child in understanding new concepts. Includes 28 of the single blocks, 12 x two blocks, 8 x three blocks, 6 x four blocks, 4 of each five, six, seven, eight and nine blocks and 2 x ten blocks plus 80 activity cards.