This building set from K'NEX comes with 325 different rods, connector pieces and a wind up spring motor, which can be assembled into 3D configurations. Kids can follow instructions to create 25 different model ideas including: a Pirate Ship Ride, a Turbo Race Car, a Helicopter and more! Help your kids develop a better understanding of STEAM (science, technology, engineering, arts, and math subjects) with easy-to-follow instructions. Retail Package : 14.25" (W) x 3.5" (D) x 12" (H), Weight : 1.7 lb