google map envelopes. so simple and easy. Use the directions feature to put a blue line between the TO and the FROM. what a fun idea!
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DIY: scrapbook paper envelopes
Cute. For creative envelopes, go to Google Maps, map the route from your letter to the other person's mailbox. Print them up, fold them into 8 by 11 envelopes
USA Map Love Map Themed Customized Art Print - 11x14 (featured on NBC's IVillage). $48.00, via Etsy.