Ideas for using patches?

Can any of you clever folks help me think of a fun use for patches? We visited our local science center, which has a fun space exploration exhibit, and I got lured in by the great patches and bought several, like so: http://www.spacepatchdatabase.com/sites/default/files/apollo-17-ab-3.JPG The obvious uses would be on a flight style jacket or astronaut costume. What's something a little different? They're great looking patches, embroidered and not just printed. I'd like to find some kind of cool way of using them but it's just not coming to me. Any thoughts?