My roommate when I first started college was into photography in a big way. He would take a picture with a polaroid, and using a regular pencil with a rounded tip he would push the ink around in the photo before it set completely and make some really cool designs.
We used to use a polaroid camera more but the film isn't exactly cheap
![Smiley: frown](//zam.zamimg.com/i/smilies/frown.gif)