Our guild does a block of the month but actually the block patterns are available all at once. The one I participated in was various star blocks. We don't exchange blocks. Each person makes their own quilt in their own color choices. At the end of the year you bring your completed top to a meeting where a picture is taken of the top. Then there is a drawing for prizes for those who completed a top. Does not have to be quilted to enter. I was lucky enough to win a $25 gift certificate from a LQS! We pay a $5 fee to do the BOM which I think pays for the prizes.