WELL MADE ---- 304 stainless steel heating cylinder, brass piston, bamboo base, alloy steel power cylinder, the rest are made of aluminum alloy, firm and durable, All the parts have done surface treatment to avoid rusting. Oil-free, noise-free. HOW TO START ---- Fill the alcohol burner with your 95% alcohol (we recommend this fuel, not more than 2/3 of the container) and light it. Let the light burn the round ended cylinder for about 60-120 seconds, then give the wheel a gently push, it will run like a charm. COLLECTION & GIFT ---- When you don't play with it, it can be placed on your desktop or cabinet as a work of art. You can also give it as a gift to your relatives or friends. If you are a Stirling collector, it will be an indispensable collection. TIME KILLER---- It's a classic and funny desk toys, this cool toy like be a good icebreaker when you lay it in your office or your home, it is a perfect desk toy to kill time, relieve stress and tune out boring coworkers without go out of the office. 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 some combustibles and get the flywheel going, and then it works like charm. All of your guests want to know what happened. It’s an amazing conversation pieces on your desk, decorative and impressive. It's funny to see people's looks and reactions when they squeeze a little shot for this Stirling engine.