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 2.75" wide x 1.375" thick x 5.5" long. 154 pieces with 4 different shapes.