SumBlox offer a unique way of learning through play. Set includes 38 solid beechwood blocks and 36 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 14 of the single blocks, 6 x two blocks, 4 x three blocks, 3 x four blocks, 2 of each 5, 6, 7, 8, 9 blocks and a single ten block.