For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
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By operating engine, children observe and understand the operation process, intuitively understand working principle of Stirling engine.
By operating engine, children observe and understand the operation process, intuitively understand working principle of Stirling engine.
Meticulous polishing, bright color, it is not easy to rust and discolor, and the slot to hold lamp, which is safe and reliable.
Metal bracket and metal piston are firm, and the whole is finely polished, which is very metallic and modern technology.
Thermal energy is converted into mechanical energy of engine, and intuitively grasp its working principle and deepen your interest in physics.
The product itself has been assembled, has collection value, and can be used as an ornament.
