I'm on a Doctor Who prop spree at the moment. Anyone thought about the 'mood patches', from the episode Gridlock? I had a feeling they would be simple to make, but I have no experience with this kind of stuff.
Anyway, here are the graphics for the patches (gotta love the concept art section of the BBC's Doctor Who website!):
All the white areas on them are transparent in the episode, so maybe they can be printed onto something like that. Anyone have any ideas how these could be made?