I was making a rag quilt with one of the grandchildren some years ago, and showed her how to make an X in each square to keep it stable. She said, "wouldn't a heart do just as well?" She ended up with a quilt with lots of hearts and one X! The hearts weren't all the same, of course (they were all free-handed, or rather free-machined, done and just as quickly as the Xs) but the differences in the hearts added to the whole thing!