My first camera was a Cadbury chocolate tin, the old type with a tin lid, which you find in India. I made the hole in the bottom, using a darning needle. The paper was taped to the lid.
I couldn’t wait to test it, so I put paper straight in there, exposed and developed it. It worked! though the picture was “failed”, some clear lines showed.
Then I tried and tried and tried again to get the correct mix of chemicals to water, and the correct exposure…. Set up my pinhole camera outside while I exposed contact prints. Logged it all. With so many variables, I got more and more confused.
Till suddenly, 3 weeks later, it worked!