I did the same thing. My DIL was due Feb 2014 but she had a shower in Nov in OH where we used to live. I ironed freezer paper to the back of muslin and also drew a square on the back of the freezer paper. I wasn't at that particular shower so couldn't supervise those squares! Some ladies and children did write clear to the edge of the muslin. ho hum. In a few cases I just redid them and no one was the wiser. Have fun with your project. And I did use the pigma pens....they're great.