The Estes Rocket Science Starter Set is an all-in-one solution. Complete with a rocket, launch system, engines, and altitude tracker, its a ready-to-launch product that appeals to families, hobbyists, and STEM enthusiasts. Features broad appeal and high repeat-play value. Includes Estes Alpha look-a-like, Estes launch controller, Estes launch pad, Estes C6-5 motors/starters/plugs, Estes B6-4 motors/starters/plugs, recovery wadding. Requires (4) AA batteries for the launch controller.