Doctor Who Letterfu
Letterfu is the art of creating a self-folding letter from a single piece of paper. Since I used it for a scout activity, I felt that I should give something back. I created a scout one and then did what came naturally - I made a Doctor Who themed one.
Getting Letterfu Designs
The official Letterfu web site is here (http://www.letterfu.com/) and you can download a bunch of great designs in PDF format. You'll also find that you can very easily make your own. All you need is OpenOffice (which is also free software).
My doctor who one is attached below. It's available in both A4 and US Letter formats.
Australia uses A4.