There's really no reason to send a postcard made of fabric and wire, but why the hell not? You can keep changing the shape of it and keep putting it back to the original rectangular shape. And of course you can mail the thing and your friends have a laugh when it shows up in their mailbox.
Step 1: Inkjet Print Onto Canvas
Print out the addresses and a bounding cut line using the inkjet printing on fabric technique.
Step 2: Cut and Peel
Scissors and fingers, but not at the same time.
Step 3: Cut and Shape Armature Wire
I used 1/16" armature wire for this. Get this stuff if you can because wire from a clothes hanger will be absolutely useless for this.
Cut it and shape it into a wacky rectangle shape.
Step 4: Seal It Up
Cut some Stitch Witchery and place it between the fabric and itself as you fold the edges over.
Now iron it all together.
Step 5: Seal the Corners
Those corners can fray and create some problems. Get some clear nail gloss or nail protector or whatever else your girlfriend will let you use and paint them.
Step 6: Get Bent
Might as well play around with it a bit. The armature wire allows the "card" to hold its shape brilliantly.
Step 7: Mail It Off
Here's the real postcard I made for my friends near Atlanta. I put a 39 cent stamp on it along with some glue for good measure and dropped it off in the mailbox yesterday morning. With luck, it should be there by the weekend.
Step 8: Success! It Makes It
There it is in what is obviously Georgia. Can't deny that, eh?