Features 1、★ Well-made Stirling Engine Mode: The whole body is made of high quality metal, and premium wooden base with 4 anti-skid pads at the bottom of model machine, The fly wheel is made of metal, enhance the industrial texture. 2、★ Attractive LED Bulb: The flywheels will rotate rapidly, making the generator's Lamp bulb lighting. When the machine works, it will be very shocking and attracting eyeballs. 3、★ Easy to Play: No need to install any accessory, start to witness this conspicuous Science Experiment. 4、★ Great Educational : The glass tube and glass alcohol lamp easy to watch piston movement directly. The best choice gift for students, teachers, children, friends and colleagues. 5、★ Easy to Operate: Fill the alcohol burner with your 75% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 30 seconds, then give the wheel a gentle push. Specification Material: Aluminum alloy, glass, Wood Size: 16x8.5x9.7cm Weight: 304g Fuel: 75% Alcohol Package List 1 x Engine Model 1 x Spare Heating Glass Tube 1 x Alcohol Lamp Bottle 1 x LED Bulb 1 x LED Bead 1 x Alcohol dropper 1 x English Instruction Manual