I have been in block exchange for seven years. We pick a block, then decide scrappy or all use same background. We've exchanged nine patches (scrappy), churn dash (aunt gracies), a maple leaf (same background), this year we did a row quilt. Each month we have a color of block light or dark then green, yellow, etc. We then meet and we all have a block completed for each other. The most fun is we hold our own quilt show and share how our quilts from the exchange turned out (if makes get them done) and we share whatever else we did during the year. Last year we had 40 quilts with only 7 members in our group. None of our quilts made from the exchange are ever the same. Next show is Sept 21st.