I'd put this mailbox out on a table at the reception to see what people write.except my mailbox would be much cuter.and painted to match ;) mighttt even use it as the official mailbox of my first home!
31 Impossibly Fun Wedding Ideas: instead of a kids table include a small bucket of crayons and coloring books on each table, with a sign that says "for kids and adults who love to color". Or something similar to that phrase:) kids area, let them be free!
Purple glitter hearts to toss at bride and groom. Look sparkly at your reception! I love the idea of putting it in the little bottle but I probably wouldn't put glitter in there it's too hard to get out!