I think I figured out my center. I have an Eleanor Burns Log Cabin Christmas Wreath wall handing that will work perfectly for at 24" block. I have always wanted to make a Christmasey quilt for our bed for the holidays and what better way than this round robin. I am going to shop for the fabric when we go to doctor appointments in Redding, next week. I have never made any log cabin blocks before other than to make the likttle log cabin pin cushion but Eleanor's instructions look like it will be a breeze to make. This is going to be a lot of fun.