ThinkGeek :: Atari 2600 Plug and Play Keychains
http://www.thinkgeek.com/geektoys/cubegoodies/80fc?cpg=cj
"Each keychain has a secret - they contain real games. Plug in the included 6 foot cable (on a battery powered reel) into the keychain and your TV , and you really can enjoy the games of yesteryear. Yes, you read that right: these keychains contain real A