Kelly Kampf Sullivan answered:
Hi, No I did not serge the edges, I did not have a problem with fraying. I am on one right now for my son, I think I improved the process. First off I cut all the shirts, cutting them a few inches bigger then my "block" size.(gave me a little to play with). The Pellon comes in 22 wide so all I did was cut the length at 16 inches(it did leave extra that I trimmed off right away, becareful on your ironing surface). I applied according to directions. Then I trimmed my squares to the size I wanted, which ended up being 15x15 inches due to the size of some of the prints on the shirts. I think this also helps with getting the Pellon right on the edge. There are a few different ways I have seen with putting the squares together, I chose the method in the photo for the impact of the shirts, no borders. I used 1/4 inch seam allowance. Sandwiched the top, batting(warm and natural), and the backing, I used fleece. Then did the tie off method for "quilting", using lots of safety pins. Added binding(I used 100% cotton for stability, since both fabrics are stretchy) I hope this helps and that I covered everything. Let me know how it goes and good luck!