I decided to make my own paper case for my Raspberry Pi. I liked the idea of something that I could just cut up and fold into shape. So, I came up with a design that uses the Pi's connectors to hold everything into place.
If you would like to use it downloads are available below for both 8 1/2"x11" paper and A4 in SVG (original) and PDF. These were created in Inkscape and are licensed CC BY-SA.
8 1/2"x11" SVG
8 1/2"x11" PDF
If the instructions don't show in your SVG viewer try the PDF version.
I printed the templates out on high-quality 32lb paper. Once I had printed it out I let my almost-2-year-old son color it before I cut it up and folded it together.