I have been building and using pinhole cameras since 1984. The first camera was made of a round cardboard box. Inside it I did put a small frame in which I could put small pieces of 120 film. The first picture I took with the camera, was this:
The camera was aimed out of a window in the house that I lived in at that time. I don’t remember the exposure time, but it was more than a minute. After the exposure I went to the darkroom and developed the small piece of film, in total darkness.
The exposure wasn’t to far away, so I somehow got bitten by the pinhole bacille. I made a few other exposures with that little camera, but then I bought some 4×5″ film holders and had to make a camera for those. I made one of several layers of cardboard and gaffa tape, and I still have that camera. It is the best camera I’ve ever made.