The Paint Can Camera is simple as it sounds. You buy it, used it and develop it.
“Paint Can Pinhole Cameras for Creativity & Fun
The Paint Can Pinhole Camera is the simplest of cameras. Each can is drilled with a precision pinhole aperture (0.5mm), and is ready for immediate use. Just load a sheet of photographic paper or film and expose it! Available in both Quart (5″ H x 4 1/4″ diameter) and Gallon (7 1/2″ H x 6 1/2” diameter) sizes with a magnetic shutter and a complete user guide enclosed. Because of its simplicity, the Paint Can Pinhole Camera provides room for experimenting and learning more about basic photographic processes. It is also just plain fun to use! The Paint Can Pinhole Camera was developed and patented by Jim Kosinski. In 2008, Noted LLC acquired the patent from Jim and now manufacturers the cameras to his specifications. US Patent#6618556. Paint Can Pinhole Cameras are made in the USA.”
You can find where to buy on the website.