The Mini Strandbeest is a fully working model of Theo Jansen's kinetic sculpture which converts the rotary motion of a crankshaft into a smooth walking motion.
You can purchase them online here (paid link): https://amzn.to/4kaIczG
https://video.nostr.build/22413f9807ae135148941aa63cd7ffa7c766307a16aa573a0020a3722ec8425e.mp4