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A Game Of Snake On A LEGO Mechanical Computer
(hackaday.com)
This is a most excellent place for technology news and articles.
A long time ago I remember reading about mechanical nano computers as an idea and this got me to look that up again. Apparently that idea is still around and is more prevalent than I expected (though that's an extremely low bar) e.g. https://www.cnet.com/science/darpa-funds-mechanical-nanocomputer/