About 7 years ago, my friends and I did a Round Robin inspired by the book "Setting Solutions" by Sharyn Craig.
The rules were kind of convoluted, but at the end of 5 rounds, there were 14 blocks of all sizes for each participant - 4 made by the owner and the rest by the group. Mind you, the group only got to see one of those 4 original blocks when making theirs.
The point was to have 14 blocks of different sizes made by 5 people, and the only thing they had in common was ONE fabric, which they had to use - even if just a smidgen - in the blocks they made.
Like I said, convoluted.
The last round - well, the last person in the rotation had to make a quilt top - a finished quilt top (with borders, not quilted).
It was great fun, and a fabulous learning experience as we all had not been quilting very long.
Here are the quilts , picture taken on the day of the big reveal: (there are 7 so give me time to upload them_
I made the Lone Star for one of the participants, and I received the Dark Blue Graphic quilt. I was one happy camper