Features:- The appearance is exquisite and simple, the unique tank shape, the decorative makes the tank model more realistic, the core components are made of aluminum alloy, durable and not easy to rust, the track is made of rubber, which makes the overall structure light.- The tank has an alcohol lamp fixing bracket, which is safer and more reliable. The lightweight fuselage structure and sufficient power make the tank have a certain ability to cross obstacles.- Instructions for Use: Put the tank engine model in a horizontal position, inject high-concentration alcohol into the alcohol lamp to ensure the safety, and ignite the alcohol lamp. Preheating for 1 to 2 minutes, the alcohol lamp heats the piston tube, and the dry air expands to generate power. At the same time, the flywheel is assisted by hand to drive the flywheel to rotate rapidly, and the tank will start moving forward.- Tip: 95% alcohol (Not Included), you can't add water, kerosene, gasoline, lighter oil, etc.- Education and fun, through the hands-on operation, you can observe the entire Stirling engine running process, more intuitive understanding of the Stirling principle, and deepen your interest in physics.- Not only is it an excellent educational toy for children, but it can also be used as a collectible.- The product is suitable for people over 14 years old.- Tips: Be careful not to be burnt by high temperature during the operation. Specifications:- Color: As Shown- Material: Metal + Plastic + Rubber- Product Dimensions: 15 x 12 x 7.5cm- Packing: Box Package Content:- 1 x Stirling Engine Model Kit