One of the things we did a couple of years ago was pizza box quilts. Everyone put a yard of fabric in a pizza box. On the lid some people wrote down things they liked or collected, but most just put their name and phone number. Then each month you grabbed someone else's pizza box. During that month you were supposed to make a 12 1/2" block using their fabric and fabric from your stash. The only rule was size of the block and you had to use their fabric in the block. In December we got our boxes back. Some people would make more than one block and a couple held boxes too long and only made one block, so some boxes had more blocks than others. I got mine back with only 8 blocks, but they were amazing. I made one more block and put it together as a baby quilt for my nephew. It's one of my favorites to date.