Smithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy Blue Type_Balance Stirling because we have strengthened the

because we have strengthened the main connection points and made a plug-in structure

Product Weight: 354g

All the order will be sent within 1 day after the order is placed

and disassembled

The low-voltage power supply ensures safety and the effect is good

Smithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy Blue Type_Balance Stirling because we have strengthened theSmithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy BlueFeatures:. Build your own car engine with a number of parts, which will be unprecedented stimulation and challenge. Switch on the assembled engine and the engine will turn. The valve opens and closes, the spark plug lights up, the piston drives the crankshaft, and the fan structure rotates. The dynamic components in this kit make the experiment real and