The first project for my rsc uses hollow nine blocks. I am using 3 1/2 inch squares. I have a box full of 3 1/2 inch strips, and, I saw a quilt that uses these blocks in colors that I can do for the rainbow scrap challenge. I only need to make 3 in each color. I've tried to make the projects for this year a little easier, so, that, I can focus the rest of the time on cleaning out the UFO closet. Somehow, the rainbow projects take over, though.