Lego Teacher Nametag Prototype

I decided to go all out and be super nerdy! What better way to do this than by creating my very own Lego nametag for school. Perhaps I can generate a Lego minifig trading frenzy like Legoland. Here is what I have crafted so far. I can tweak this a bit more and make it better, but this works. I just need to figure out a way to make it attach to my shirt. I need a pin type operation for the backside or some rare earth magnets. I have a bit of time left this Sunday to figure it out.