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Can a Lego Car Roll Downhill Forever?

I just really love the hell out of these iterative Lego build videos from Brick Experiment Channel and Brick Technology. In this one, a car is repeatedly modified to roll perfectly on an increasingly inclined treadmill. I started watching and in 10 seconds I was 100% invested.

They’re not even really about Lego…that’s just the playful hook to get you through the door. They’re really about science and engineering โ€” trial and error, repeated failure, iteration, small gains, switching tactics when confronted with dead ends, how innovation can result in significant advantages. Of course, none of this is unique to engineering; these are all factors in any creative endeavor โ€” painting, sports, photography, writing, programming. But the real magic here is seeing it all happen in just a few minutes.

See also A Lego 5-Speed Manual Transmission, Designing a Lego Car to Cross Gaps, Engineering a Capable Climbing Lego Car, Making A Solar-Powered Billion-Year Lego Clock, and 20 Mechanical Principles Combined in a Useless Lego Machine.