A block set especially designed for toddlers thru two year olds. Four simple shapes of blocks provide the sturdiness needed to learn to balance the blocks successfully. Block building is a small group activity and this set is assembled for two to three children. Constructed of hardwood, edges rounded and sanded smooth. Based on the precise unit size of 2-3/4"W x 1-3/8" thick x 5-1/2" long. 154 pieces with 4 different shapes.