Here is a pic of my cap that I made to wear, so when I threw it in the air proud, I would be able to find it easily. My roommate Christina and I made our caps to match. It was so fun and very easy to do, however you do have to have access to a di-cutting machine.
All you need is:
1. Construction Paper
2. A Di-cutter
3. Adhesive tape (I used Zips Adhesive Lines ultra thin and it worked great!)
Here is the result: