When you take a photography class, one of the first projects you may have is to build a pinhole camera. I remember building my first pinhole when I was eight years old. My class was taken to the Clara Barton grade school in Fargo because they had a fine arts lab there, we would go there every few weeks for ceramics and things that take more than paper and pencil to do. I think it was the fall of 1976, I remember it being pretty cold but no snow. We used an oatmeal can and some photo paper that we loaded in the dark room. You can do the same thing with these handy links. Back when you could buy 126 film cartridges you could make an even simpler one than this.