Remember that Barney Google membership card I got back in 2007? No?
Well check out these posts first: OKMNX! and OK Ham and Eggs!
Then have a look at this. :)
A card issued for the Radio Chapter No. 1 WSUN. I had no idea these existed until I stumbled upon one on eBay. (Notice the image of Barney doing the secret sign in light yellow behind the text.)
Now, I just gotta find a Nanny Goats membership card.:)