I came to build my microscope basically from being a techie looking for an interesting project to build, having a spare Raspberry Pi and camera module and a 3D printer, but no clue of microscopes or biology.
So I built it. put a drop of dirty water from the garden on, and then the wife and me spent an evening chasing interesting looking creatures. And today I think I witnessed a cell division, live:
Thanks a lot to the people that made this wonderful project!