Step-by-step explanation:
A pinhole camera is the simplest yet most misunderstood camera. It takes amazing pictures, Get yourself a box that has a top and bottom which can be pulled apart 4 x 5 is a good size and available in the gift box department of Dollar Tree store.
Poke or drill a small hole 1/8" dia. Put a piece of black electrical tape over the hole and have a small tab on the end so you can grab it and pull it off as the hole becomes the lens and shutter. Put a sheet of film on the bottom "a still scene" works best and pull the black tape off the hold quickly and replace it quickly. (try to use a slow speed film) The picture is done and you can take the film out inside your darkroom and develop it. If you can get ortho cromatic film from a printers office or newspaper that would work best as this type of film can be watched under a red light in the darkroom to see how it is developing so you do not over develop the negative. Ortho film was the firs dry film invented and is sensitive to all colors of light except red so you can watch it being developed in the darkroom under red light.