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How to Make a Marble Machine From Cardboard

In this exciting DIY tutorial, learn how to make a marble machine from cardboard with step-by-step guidance. Discover the ...
Hackaday

You’ve Got All Year To Print This Marble Machine Ornament For Your Christmas Tree

Most Christmas ornaments just hang there and look pretty. [Sean Hodgins] decided to whip up something altogether fancier and more mechanical. It’s a real working marble machine that hangs from the ...