In the quest to find more things to put through the mail I turned to the Swedish masters at IKEA. These guys and gals are the ones to watch in terms of shipping so I figured I'd just hack their picture frames into some funky postcards.
This method is a little high-tech, but there's an easy low-tech modification for it.
Step 1: Get a Cheap Frame
Dig through the photo section of IKEA and you'll find plenty of options to show off a photo. Most of these have glass, but the real score are the cheap cheap frames with the polystyrene windows. They're safer to work with and the post office will definitely thank you for it.
My favorite find is the ISIG frame. Two frames that hold 5x7 photos for $3! A tasty deal and even my cat dug the smell when I tore the wrapper off.