1、ATTRACTIVE COLOURFUL LED WITH MOTOR INSTALLED: The stirling engine equipped with a colorful LED. 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 LED light to emit different colors, which is really interesting and imaginative toy 2、EXTREMELY WELL MADE: The board is made of Russian pine, using fine grinding manufacturing; Stent using molding aluminium alloy manufacturing, solid and firm; Flywheel, ventilation pistons, aluminum fine cars, fine milling, texture and beauty double combination; Rod made of aluminium alloy manufacturing; Dynamic link sets of aluminum alloy cylinder, power cylinder and the power piston with fine grinding surface of special processing, possess high hardness. Do not wear high speed ultra long running 3、EASY OPERATING AND LONG LASTING: Fill the alcohol combustor with your 95% alcohol(not include, we recommend this fuel) and light it(support 75% alcohol, but its power will be weaker than 95% alcohol). Let the light burn the round ended cylinder for about 20 seconds, then give the wheel a gently push, will run like a charm. Can run for 8+ hours continuous without any broken which test by one customer 4、STRONG PACKING: Sterling engine model glass tube is packaged separately with bubble bag to avoid damage during shipment. Easy to take off the package and put back to the place. Wood base is bare black 5、PRIORITY GIFT OPTION FOR MANY APPLICATIONS: Hot stirling engine model is an amazing and fantastic product at this price. Its elegant gift package make it spruce up and presentable, has a wide range of application as, great gift to Kids science project, physical or mechanical learning, teacher Demo props on the class, birthday gift to friends, families, parents, kids, etc. Many of customers come from school, colleague, etc.