Magnetic (fridge) Marble Run
thingiverse
This is a marble machine that you can build and rebuild over and over again on your fridge or any other magnetic surface. I'm using neodymium magnets 10mm in diameter and 2-2.5 mm thick. The blue tubing in the picture are left over protective tubing for from a water installation held up with hardrive magnets. The parts are designed for marbles of about 16-17 mm in diameter. I cut and glued an acrylic front on the marble divider, if you don't the marbles will fly everywhere :) https://youtu.be/yRDBU4SsTeA
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