Smithsonian Motor-Works

Amazon.com Price:  Original price was: $39.99.Current price is: $24.99. (as of 29/12/2019 17:13 PST- Details)

Build a Working Model of a 4-Cylinder Engine
Valves Rock, Spark Plugs Fire, and Pistons Drive Crankshaft
Battery Operated Moving Parts and Lights

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