For talented teenage mechanics, here is an instruction book on how to build a small homemade car with rules on construction of the engine, chassis, wheels, brakes, the technique of engine mounting and all the essential finishing touches. Safety rules pertaining to construction and operation provide a secure checklist. If he prefers, the young motor enthusiast is offered the alternative of buying a kart. Since this requires a good deal of knowledge, chapters are provided on what to look for and the manufacturers in the karting business. Illustrations and diagrams help out all along the line in a book for an obviously limited market.