Hello Alabama. I am from Wisconsin and I made a lap quilt for my mother from my father's shirts. I think most of them were poly cotton. I cut them into 5 inch blocks and sewed them together. My mother loved the quilt and slept with it every night. It had the scent of my father (Don't wash the shirts. While they may have been washed since he wore them they still have his secent.) and she loved having that quilt. After she died I offered the quilt to my sister saying I cold make myself another one. She was not careful when washing the quilt and it came apart. The reason I am telling you this is because I want to suggest you zig zag all the rows as you sew them together, or maybe double stitch the rows. The shirts are not new and the material is different that what we use for regularly making our quilts. They do not hold up as well and need extra reinforcement. My sympathies to your daughters.