Feature: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, WoodSize: 16x8.5x9.7cmWeight: 304gFuel: 75% AlcoholPackage List:1 x Engine Model1 x Spare Heating Glass Tube1 x Alcohol Lamp Bottle1 x LED Bulb1 x LED Bead1 x Alcohol dropper1 x English Instruction Manual