Hot air Stirling engine motor model educational toy generator product description: Unique shape---- The power cylinder is separated from the hot cylinder and then combined into an L shape. Unlike other models, it grabs attention. This is a very fun and imaginative toy. Well-made----The bottom plate is made of brushed aluminum alloy, which is exquisite and beautiful; the frame is CNC finished, indicating that the sandblasting treatment is firm; the aluminum alloy flywheel; the connecting rod is made of stainless steellaser cutting; the heating cylinder is made of custom thickened glass material , long-term heating without pressure. The overall shape is exquisite, the texture and beauty are combined; Easy to operate and long lasting - fill the alcohol burner with 95% alcohol (we recommend this fuel) and light it. Let the light burn on the cylinder at the round end for about 60-120 seconds, then push the wheel lightly and it will work like a charm. In addition to stirring, you can also get an extra bonus - still worried about the cylinder glass breaking during transportation or use It does come with a spare glass tube, check out the gallery image. If there is any damage, you can replace it quicklyand easily. Priority gift option for many apps ---- this is an amazing and fantastic product for this price. Its elegant gift wrapping makes it look pretty and pretty. It has a wide range of applications, such as great gifts for childrens science projects, physics/mechanicallearning, teacher classroom presentation props, friends, family, parents, birthday gifts for kids, etc. Many of our clients are from schools, colleagues, etc. product content: 1 set of engine models (without alcohol)