I read one of your listings for the keychains. So I guess the problem isn't that they don't know they are keychains, but that they don't know about "Ogham".
I would make a nice sign about Ogham, and then hang the keychains under it on hooks with a small tag identifying it's English word equilivant.
Ogham sounds fascinating and is something I've never heard of, so it makes you very unique - play that up and promote it!
I would be looking for a multisided display that rotates to display them and put the info sign on top of it. Something along this line:
http://i00.i.aliimg.com/img/pb/899/784/494/494784899_950.jpg