Thanks, Deb! My daughter was really surprised. I gave it to her the night before the wedding to be sure she was thinking about what else they might want to put in it. That's when they decided on the letters to each other.
My DS's GF has already hinted for one for them - they told me after my DD's wedding that they were getting married at the end of summer. I think they didn't want to tell anyone before DD's wedding to take away from her day. At least I have experience behind me now - maybe the next one will be easier. Sandy