So after seeing the pinhole pictures posted by fstop23 earlier today, I'm hooked. I've been researching them all day, and am planning to make one tonight after I get off work. But I have a question about the films i could use in a pinhole camera, or what I could possibly use.. I shoot 35mm film, but I'm a poor college student and its getting expensive. I don't have the equipment to develop film myself, so what kind of film could I use that wouldn't require developing (if possible) or very little to none. Could I throw a polaroid in there? If so, how would I keep it from exposing when I removed it later?