ENJOMOR Aircraft Free-piston Stirling Engine Motor Toy Brand_Huina the piston movement can be

the piston movement can be clearly seen

1 x Model Kit

and its huge teeth are creepy

Please use the machine according to the instructions to avoid damage to the machine by wrong operation

Safe end step:

ENJOMOR Aircraft Free-piston Stirling Engine Motor Toy Brand_Huina the piston movement can beENJOMOR Aircraft Free piston Stirling Engine Motor ToyFeatures:. Science Education Toys: This stirling engine external combustion model with novel design and equiped with cool propeller head. People will curious about the interesting and imaginative tabletop technology toy.. Easy to Run: Just heat it up with an alcohol lamp and turn a propeller, and it runs steadily and quickly. You can observe the whole process of the engine.. Excellent Manufacture: