From HACKADAY - What have you been working on during the Great Chip Shortage? has been living up to their handle and building BEAM robots that are smaller than any we've seen before. What are BEAM robots, you say? Technically it stands for Biology Electronics Aesthetics and Mechanics, but basically the idea is to mimic the movement of bugs, usually with found components, and often with solar power.... See the whole story here - https://hackaday.com/2021/09/25/tiny-beam-robot-smiles-big-at-the-sun/?fbclid=IwAR1qOeJ_Vr40JoZJFp7ep58q_UvTYG3df45SmEaLD4ywH610Bs9PLWFm6BU
See also - http://solarbotics.net/bftgu/tutorials.html