Reddit reviews DjuiinoStar Low Temperature Stirling Engine

★EASY START: just place on a mug of hot water and give it a spin and you're up and running; as long as enough temperature difference maintains, it will keep running like Forrest Gump. People will be shocked and surprised once this little engine start to work. It will definitely be a GREAT CONVERSATION PIECE on your desk.★WIDE APPLICATIONS: people bought it for kids' science project, physics/mechanics learning, demonstration on class, etc. It's a well-designed and crafted mechanical toy; great to display basic principle of external combustion engines; fantastic gift for people you love. Many people bought our machines as gift to families, teachers, friends, boyfriends and seldom will our machines failed to cheer them up!★MOST CLASSICAL STIRLING ENGINE: with elegant design and fine workmanship, this is a beautiful piece of art. Many people are satisfied with the fit and finish of our engine.★SAFE FOR KIDS: Complies with the applicable regulations and standards under CPSIA and any other acts enforced by CPSC; passed Toxic Elements Test/Flammability Test/Physical and Mechanical Test of ASTM-963 Standard Customer Safety Specification For Toy Safety.★RISK-FREE SERVICE: if the one you receive does not work, which rarely happens, simply send us a message and we will mail you another FREE WITH NO HESITATION.