I have some of those practice panels. I was planning to use a bright kid print for the backing, thenbind and donate for a charity quilt. Since the ones I have are all white except for the lines, I thought I might also use some fabric paint to paint over the lines after stitching - or fill them in like a coloring book. Hmmm, our last guild speaker demonstrated using crayola crayons on fabric - might think about that.