You can make your camera using something as simple as a shoebox. These are called pinhole cameras because your make-shift lens is literally a hole made by a pin or sewing needle. The body needs to be completely light tight and you need to have a secure shutter. Then you just need a darkroom to load and unload the photo paper. Here’s a link to a site called Instructables that gives you step by step directions on how to construct your own pinhole camera. This site is a great resources for any DIY projects.