To do this, all that is needed is a Polaroid Land camera, some small screwdrivers, and a small sheet of thin metal. These cameras can be found on eBay, or better yet, at yard sales. It will be made into a pinhole camera with several pinholes that can be switched into place, for use in various light conditions etc.
With a thin blade, pry off the cover plate on the front of the camera. Remove
the plastic ring around the lens, and discard it. Unscrew the lens, and set it
aside (this will be made into the lens cap). Cover the small semicircular slot next to the lens with a piece of electrical tape, to prevent light leaks.