Feature:1. Hands on Activity: This hot air stirling engine will show you how thermal energy is converted into mechanical energy of the engine.2. Educational Toy: This stirling engine model allows your kids and students to see more clearly about its low temperature working principle, improving their interest in physics.3. Stainless Steel: The bottom plate of this stirling engine toy is made of brushed stainless steel, exquisite and beautiful.4. Scientific Structure: This hot air engine model can be easily assembled. Scientific overall structure design ensures the integrity and stability of the system.5. Wide Application: This engine motor model is widely used in children's science projects, physical/mechanical learning, and as a demonstration prop for teachers in the classroom.Specification:Item Type: Hot Air Stirling EngineMaterial: Stainless Steel, Zinc Alloy, GlassFuel: 95% Alcohol ( Alcohol Not Included ).Package List:1 xHot Air Stirling Engine2 x Alcohol Bottle2 x Alcohol Pad1 x Bulb3 x Rubber Band2 x Magnet2 x Power Clip1 x Wire1 x Voltmeter