Ep 3 Building Oil Pump: Engino play to invent Discovering STEM (Science, Technology, Engineering and Mathematics) Mechanics Cams and Cranks. Build 8 working models of cams and cranks such as a fishing crane, moving figure, oil pump or drill, sewing machine, flying eagle, moving bridge, a stationary bike and a windmill. This is a great educational toy for boys and girls ages 8 - 16 and on. 6 builds in the printed instructions and 2 more available for free online.

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