TinkerCAD is free, web-based modeling software that allows you to easily create your own models and export .stl files for printing. It's even easy enough for elementary-aged students! Maybe something for Printer Chat?
At work I do much design which is very difficult but interesting, consuming at the same time. I used to spend my whole free time learning new techniques, to make things look more and more real. When I got my aim, it came to me that I could do something&