Fine Motor Skills Logic & Reasoning Hand-Eye Coordination Gross Motor Skills Socialization No splinters, bumps on the head and forgiving corners to avoid lacerations! Encourages Development Fine/gross Motor Skills, Logic, Reason, Hand-Eye coordination, Socialization and Visual Sensory Skills Better than Wood! Can even be used in Bath! Blocks float and stick to each other to make a building platform when wet! Great for one or more player You'll think it wood until you pick it up! No splinters, no heavy, sharp wooden corners to worry about. 30 fun pieces of exponentially sized shapes (i.e.2 squares =1 rectangle) made of firm thick Edu-Foam.