I thought this was such a sweet idea. Last Spring, I noticed some of those cute mailboxes in the Target dollar section and grabbed a couple. So glad that I did. I brought them out and showed them to the kids last week. I asked them if they would like to decorate them and make drawings/notes/valentines throughout the next little while to put in each other's mailboxes. Their reaction was awesome. They were so excited to get started.
Have a Happy Day!