Recently I saw an oatmeal box in a friends room and for some odd reason it reminded me of a time when I was a kid and I made a pinhole camera out of an old oatmeal box. Essentially, what the camera does is reproduce what your eye does. A small portion of light is flooded into a pinhole in a completely dark container i.e. an oatmeal box and the image is then developed on photo paper. It sounds complicted but if I could make it when I was 12, anybody can.
Below are two resoruces to help.
This first is a link to a SDSU physics page which has really, REALLY detailed information. Pay close attention to the film development portion.
Next is a quick overview video that shows how to make it and it serves as an excellent supplement to the lengthy instructions (and is actually far less complicated)
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