“The Playz V8 Model Engine is a great kit for learning about engines,” said one shopper. “It's easy to build, fun to operate, and a perfect gift for anyone interested in engineering.” ...

Playz V8 Combustion Engine Model Kit That Runs - Build Your Own STEM Mini V8 Model Engine Kit for Adults & Kids Age 12+, Visible V8 Mini Engine Kit That Works for Adult w/ 270 STEM Parts 4246 ratings ...

One engine kit with practical use possibilities is the MUSA Red Dog single-cylinder engine kit, which can be used to power model airplanes and boats. This air-cooled, gasoline-powered engine ...