I am in a group of 6 ladies that meet at my house once a week and we decided to make house blocks. I handed out a pattern and each lady designated what colors they wanted in their house. For instance, I decided I wanted a RWB house. Then the other ladies made a RWB house block for me and a house block in each of the other ladies choices. It was really fun and I am binding my house block quilt right now. Hope to show you all soon. Also, I was in an exchange block in another group and we all made bow tie blocks and exchanged them. A bow tie block would be easy for even a beginner as you mentioned that your group has all levels of sewers. Just some suggestions. Good luck on your decisions