Have you ever seen the guy that builds the wind powered stick robot/bug thingies? That shit is way cool. Sorry I don't have a link or name. They're all made with, I think, thin sticks. The bot/bugs get pretty big, like nearly big rig trailer size. No motors, or sails, but they are wind powered and crawl along the beach. Edit: I was wrong, they do have sails. https://www.wbur.org/artery/2015/08/19/strandbeests