Many things! There are all these designs floating around in my mind that I can't build easily because I don't have a 3d printer. Adjustable camera mounts for m

Many things! There are all these designs floating around in my mind that I can't build easily because I don't have a 3d printer. Adjustable camera mounts for my computer vision projects...a tablet mount to hold my tablet at a particular angle while I'm lying down and reading... better supports for my old arthritic dog...cat toys...waterproof cases for my embedded projects and sensors...chassis for small robotic vehicles...