Childcraft Wood Building Block Set includes assorted shapes of blocks with a standard focus on identifying shapes, sorting and classifying by shape and size, make forms and models. Unit blocks form the cornerstone of the early learning experience. Blocks are flexible enough for simple manipulations of a three-year-old and increasingly detailed and symbolic structures for the older child. If a block splits, breaks or splinters in the course of regular use, it is guaranteed to get replaced free of cost. All sizes are multiples or divisions of the basic 1-3/8 x 2-3/4 x 5-1/2 in. unit. Block specially designed for young children is classroom tested and ready for home or school use. 7 shape blocks is a childhood necessary product. 65 per set.