Stirling Engine Kit Hot Air Motor Model Educational Steam Power Toy Electricity Learning Model Toys Attractive colored LED with built-in motor --An eye-catching LED is installed in the Stirling engine. High-grade alcohol produces heat, which causes the engine to run erratically and generate energy...

Stirling Engine Kit Hot Air Engine Motor Model Educational Toy Electricity Generator Colorful LEDNOVEL DESIGNED ----- Unlike the typical beam Stirling engine model, this engine has a balance style. On the motor, there was a multicolored LED installed. The engine will run crazily and produce powe..