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
Chalkboard Pots: Organize plants and seedlings, and identify homegrown kitchen herbs, by painting the collars of clay pots with stripes of chalkboard paint (available at craft stores). After the paint dries, write the name of each plant using chalk.
Flowerpot Food Covers Use flowerpots to protect dips and other dishes from party-crashing insects. Create a handle by cutting an length of cord and knotting the ends together. Thread the looped end through the drain hole in the flowerpot.