Sunnytech Low Temperature Stirling Engine Motor Steam Heat Education Model Toy Dwcl-01 FANTASTIC SMART THING WITH EXTREMELY WELL MADE WHICH RUNS LIKE A DREAM----The stirling engine is produced with high quality material and elegant workcraft. this stirling engine adopts mirror surface stainless steel for the base, glass cylinder liner, precision bearing, bearing steel shafts, zinc alloy flywheel. All the parts have done surface treatment to avoid rusting. Oil-free, noise-free. AMAZING QUIET AND FAST RUNNING----It active to run by only one level, this make the stirling crazy quiet. Two mini magnetic installed to make the stirling run fast. One in the center of the black pie in the basement, the other install in the bottom of the glass cylinder. They are self-aligned, attract to each other. It can run for 24+ hours continuous without any broken if there are continuous power supplies. One customer put the stirling on USB hot plate and stirling runs on his desk for weeks. OPERATION EASILY----Pour a cup of hot coffee, put the stirling on the cup, it run magically. When it slows down, the coffee temperature is suitable for drink. Enjoy physical powertrain mechanism display and coffee. It also can work on top of ice cube. Some guys put the stirling on cup of hot water and put small ice cubes on the stirling upper plate. This makes the temperature difference much bigger than normal, then it runs even more fast and crazy. Just enjoy the toy! 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. AMAZING CONVERSATION PIECES ON YOUR DESK----It's funny to see people's looks and reactions when they squeeze a little shot for this Stirling engine. Put it on the cup which full with hot waters, give the flywheel a gently push, and get the flywheel going, and then it works like charm. All of your guests want to know what happened, ice-breaking success. What a marvelous toy!