Cardstore makes it easy to personalize and mail happy birthday cards like Happy Birthday Girl card. Just add your own photos, text and a signature to a simply stated happy birthday cards and we'll mail it for you!
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