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I built a LEGO rock tumble to see if i could actually polish rocks with it!

Building this LEGO rock tumbler required designing a custom rolling drum that could hold the weight of the rocks and the abrasive grit. I focused on creating a motorized mechanism capable of running for an extended period to ensure the stones achieved a smooth finish through consistent mechanical friction.

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0:00 The Challenge of Building a Lego Rock Tumbler

1:25 Constructing the Motorized Base

5:20 Building the Protective Shell

8:29 Preparing the Drum and Materials

12:37 The Final Reveal After 64 Hours