2-in-1! Build a supersonic jet, then build a heli-plane with rotating propellers. Over 400 K'NEX rods & connectors are included, plus a battery-powered motor. Build a jet with motorized, rolling wheels and an open-and-close cockpit! Then take it apart and build a heli-plane with working, motorized propellers that you can adjust to spin vertically or horizontally. All K'NEX rods & connectors are proudly made in the USA. Ages 7+. Requires 2 "AA" batteries, not included.