Classic Rube Goldberg machines get a tech twist with 3D printed marble machines. From the very basic with hand turned cranks to the more complex with motors and lights, any one of these are an ideal lesson plan in the making for a STEAM classroom. Head over to http://3dstartpoint.com/3d-printed-marble-machines/ to see the blog with photos and videos of these 3D printed marble machines in action.

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