This is my SewUseful contest entry. See it for sale on Etsy! http://www.etsy.com/view_listing.php?listing_id=6412485
Step 1: Simple ingredients and words of wisdom
You'll also need a sewing machine, thread, scissors, pins, a pen (not pictured), some velcro, a seam ripper and measuring tape.
Important! Sewing denim is different than sewing other materials. Ideally you should use a special needle made for sewing denim. Also, a zipper foot to substitute for the regular foot on your sewing machine will make sewing this bulky project a lot easier (keep your regular foot close by for finishing the edges though).
Denim is strong - I broke two needles, a pair of scissors and a seam ripper making just two of these little pocket pals. That taught me some lessons I'll pass on to you: Don't force anything and Always cut through the thinnest area possible.
Finally, if you find that the bobbin (bottom) thread becomes loopy as you sew you may need a thicker upper thread. You can also raise the sewing machine's tension setting for the top thread.