Just an idea...
My wonderful EA helped me put these together last week. Instead of boxes, bags, etc.. we will each have our own mini scrap book that will hold all of our friend's Valentines. At the end of the book, we have a picture of all our friends on Valentine's Day!
I bought these clear photo albums at Wal-Mart for $1.00, and cut construction paper for the front & back. Then, I just add a label to the front.
The kids love them! Instead of going home and throwing away our boxes.. :( the kids each have a small book to look through, and remember the fun we had on Valentine's Day!!!