Chubby, easy to grip, colorful, flexible interconnecting building blocks made flexible and safe. Six bright colors and assorted shapes for near limitless building combinations. Made pliable to resist cracking if stepped on. Developmental qualities include Gross Motor Skills, Socialization, Building Logic, Reasoning, Color Matching and Hane Eye Coordination. Basic size: 3 1/2' x 3 1/2' x 3'.