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National Geographic 4-Cylinder Engine Building Kit Working Model for Kids | 175+ Pieces, Moving Pistons, Valves and Gears, Clear Engine Model, DIY Engineering Toy, Tools Included, Birthday Gift

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$95.39
BUILD YOUR OWN ENGINE – Assemble a clear 4-cylinder engine model kit with 175+ durable pieces. A fun DIY engineering toy engine that shows how pistons, valves, and gears really move.
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