The product has been assembled and can be used directly metal structure, rugged and to use An for ideal as a, kids, family and more high‑quality metal, hard, corrosion‑resistant, and long service life Similar to the working principle of internal combustion engines: Burning lamps provide power heating to expand the internal, thereby increasing the power of the internal molecular to act on the flywheel With the help of the flywheel, thermal energy will be converted into mechanical work It has a wide range of application, perfect for kids ' science project, physical / mechanical learning, teache ' s demo props on,, families, kids Through hands-on, you can observe the entire process of Stirling engine, more intuitive understanding of Stirling principles, and deepen your interest in physics, Manufacturer: Oxxggkao