I built a photo-taking-robot for my wedding, because every wedding needs a robot photographer. This one was done around an old rangefinder with a Raspberry Pi strapped to the back, a lens removed and a camera module placed inside. Push the button, and a bash script flashes a built-in light, takes a photo, saves a copy, and prints it out on thermal paper. The whole thing packs up inside the base for easy transport. And unlike printer ink, one roll of paper lasts longer than I’ve ever needed.