LaWendula (LW) of Woven Letters started the College Box Project which you can read about here.
Basically the idea is that LW sent off a box with 144 "snippets" of paper to the first participant, who can take out 12-20 snippets and put back in the same number from her own stash. Then she makes a collage with the snippets she removed and (I think) whatever else she wants to use (that's the part of the directions I need to read soon). Hopefully, I will make my collage this weekend and post it here!
Here's some photos of the box (above) and what I took out & what I put in.
This is what I took out.









This is what I put in!