This is the heat dynamic model of DIY engine, stirling heat generator, beautiful scientific experiment device. This engine does not need to add water, dry-burning air expands to generate power. Help cultivate children's interest in physics, make the process more intuitive and easy to understand. Aerodynamics is rich in physics knowledge, also a mode of training children's ability and mental ability. Installation requires patience, patience and patience. You can have a try.    Features:  Physical motor heat power electricity generator external combustion engine model kits.  The heat power to make the expansion of gases inside, then the gases molecular internal power increasing and working strongly to the flywheel.  With the help of the flywheels, the heat energy will convert into mechanical work, then convert into electric energy.  Elaborate workmanship, the whole body is made of high-grade materials, can provides long service time.  Help cultivate children's interest in physics, make the process more intuitive and easy to understand.  A perfect educational toy for children, suitable for classroom, laboratory, or home experimental use.  Exquisite home office desk decoration, and also a delicate gift for your children.    Specifications:  Name: Stirling Engine  Material: metal  Item size: 160 * 80 * 70mm / 6.30 * 3.15 * 2.76in  Item weight: 300g / 10.58ounce  Package size: 180 * 100 * 120mm / 7.09 * 3.94 * 4.72in  Package weight: 384g / 13.55ounce    Packing List:  1 * Stirling Engine  1 * Furnace