3D printed marble machines are nothing new. We have covered a few of them here in the past. This Marble Mountain was printed with PLA. It has two lifts and two paths for the marbles to roll down. It has several caves and tunnels for the balls to go through.
More gadgets like this: here
This particular model has a footprint of 12 x 12 x 11″. It uses 0.25-inch metal balls. StarsoftheCity is selling this on Etsy.
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