Not Into Elves? Become a Chipmunk

Sucking helium solely for the effect it has on your voice is a time-honored tradition among kids, and probably the only instance of substance abuse you won't get vilified for.

Couple that with an effort like Elf Yourself, and you've got a bonafide interactive promotion for Alvin and the Chipmunks, the feature film based on our favourite childhood show. (Next to Shera and He-Man, anyway.)

Hit Munk Yourself to get "munked," (Get it? Chipmunks?) without the helium. It's definitely safer, even if it cuts the fun in half.

Catch our munked rendition here. And read more about the customizable viral craze, and how it relates to our old buddies Alvin, Simon and Theodore, at Brandweek.