Activity & Learning Toys

External Combustion Engine Model, Balanced Two Cylinder Hot Air Stirling Engine Motor Model, Physics Science Experiment Toy Kits for Adults and Teenagers Metal Novel Shape: It is a balance-type two-cylinder structure, installed with a small generator, heated by alcohol, the engine runs steadily and rapidly and generates electricity, thereby bringing a bright voltage meter, LED or light bulb. When the... External Combustion Engine Model, Balanced Two Cylinder Hot Air Stirling Engine Motor Model, Physics Science Experiment Toy Kits for Adults and Teenagers