It shouldn’t come as much of a surprise, then, that you can also still buy and build the Visible V8 model ... Wankel kit, a working, motorized 1:3 scale model of a two-rotor rotary engine.

“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.