Safe, soft and uniquely flexible knobby shapes interlock with each other from practically every side. Includes flexible wheels and axles. Includes 72 pieces to build race cars, houses, robots, furniture and more. Comes in an easy clean up screw top jar with handle. Construction Design ideas are included. Developmental Qualities include Fine Motor Skills, Reason, Logic, Hand Eye Coordination, Tactile Sensory Development. An EZ Grasp product.