DIY map envelopes- make them picture (a little larger than sized, and use maps of the places you've been to store the pictures from that trip. Write place + year on front and store them in a box together. Love this idea!
What a nifty idea! if you want creative envelopes, go to Maps, map the route from your letter to the other person's mailbox. Print them up, fold them into 8 by 11 envelopes (or smaller if you are sending cards). This would be cool for pen pals