Features 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 Engine Material: Stainless Steel, Zinc Alloy, Glass Fuel: 95% Alcohol ( Alcohol Not Included ) Package List 1 x Hot Air Stirling Engine 2 x Alcohol Bottle 2 x Alcohol Pad 1 x Bulb 3 x Rubber Band 2 x Magnet 2 x Power Clip 1 x Wire 1 x Voltmeter