Sunnytech Hot Air Stirling Engine Education Toy Electricity Power Generator LED (FD05M) ATTRACTIVE 4BLUE LED MOTOR INSTALLED-----The stirling engine equipped with a 4Blue LED motor. Because of the heat from high-grade alcohol, the engine will run madly and create the electricity. The power will go through the wire and drive the Blue LED lighting. It's really interesting and imaginative toy. EXTREMLY WELL-MADE---- A carefully crafted engine with high grade zinc alloy standsturdy and fruiting; High quality steel base with Fine grinding and surface spray paint; Flywheel, air exchange piston, power cylinder liner and hot cylinder liner is made of aluminum fine cars, fine milling, texture and beauty double combination; Axle joints connected with very high precision miniature bearings, stability without lubrication; This is a very elegant and smoothly functioning Stirling engine model LONG LASTING & EASY OPERATION---- The heating head of the hot cylinder is made of stainless steel, it is more safe and durable than ordinary glass cylinders; Fill the alcohol burner with your 95% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 20 seconds, then give the wheel a gently push, it will run like a charm. YOU GET EXTRA BONUS EXCEPT THE STIRING----Still worry about the broken during shipment or usage? It did come with one O-rings, allen keys repair tools and others parts inside the package, check the gallery picture. You can replace it fast and easily if any broken. You can contact us for support if need. We also can make offer for your future parts requirement. PRIORITY GIFT OPTION FOR MANY APPLICATIONS----It is an amazing and fantastic product at this price. Its elegant gift package makes it spruce up and presentable. It has a wide range of application as, great gift for Kids' science project, Physical/mechanical learning, teachers Demo props on the class, birthday gift for friends, families, parents, kids, etc. Many of our customers come from school, colleague, etc.