Roominate Helicopter, 44 Pieces 3 designs in 1! Build a helicopter, airplane, submarine, or come up with your own design! Wire up the motor circuit to make a spinning propeller! 44 piece set includes building pieces, motor, switch, battery pack, doll, pet bunny, and screwdriver Teaches important STEM skills: hands-on problem solving, spatial and fine motor skills, self-confidence, and creativity Compatible with all other Roominate products and encourages open-ended play for endless possibilities