@ObsidianUrbex - we got to do pinhole cameras in 6th grade with 126 b&w film cartridges. We developed our own film. It was awesome! My class ended up with a much higher percentage of photo hobbyists than other classes that didn’t get that experience. That was 1978. I don’t remember much about the cameras or those specific cartridges, but the developing process fascinated me. Picked up a Kodak 126 camera at a yards sale. 🙂