Powered Model Construction Kits
These seriously cool construction sets explore the principles of mechanical and electrical engineering in a very hands-on way. In each kit, children are building a variety of powered models that demonstrate scientific concepts and technology. And of course, you have a vehicle, boat, or other moving model at the end that you can "just" play with too. Each kit not only includes all of the parts needed to build each model (except batteries), but also includes a full-color, well-illustrated experiment book that helps them build the models and understand the scientific principles involved.