This Dr. Fart keychain is a sure fire way to make your friends laugh - and it is right at your fingertips! The Dr. Fart is a keychain with built-in fart sounds that you can call up at the touch of a button. It's gas on the go, ready for action whenever you need a quick laugh. Dr. Fart has six digitally reproduced farts, like the Ripper or Power fart, that you can recall at a push of a button.