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Re:Show HN: I've built self-opening trash bin, I relax mysel... by ragebol on Tuesday September 01, 2020 @04:09AM (#24339562)
And add googly eyes, makes many things better.
Re:Show HN: I've built self-opening trash bin, I relax mysel... by robotfelix on Tuesday September 01, 2020 @08:29AM (#24341063)
These two suggestions strike remarkably close to a fun university project I did, which featured chewing motions and Kinect-powered eye-contact :)

ROBERt (Recycling-Of-Bottles Encouragement Robot) https://www.youtube.com/watch?v=j02o4AaIu9w

Turns out a lot of humans will stick their arm inside just to see what happens!