this is not art/design related, but this site is called Things That Make My Day, and this definitely fits the bill. Ah! I think it will be worth 2 minutes and 40 seconds of your day, but only if you want to feel warm and happy inside.
EDITED on JAN 31 2009: looks like this video was removed due to it's insane popularity! you broke the internet!
EDIT AGAIN: seems to be back, and is funnily enough the post that gets the most repeated hits on this website. Now I know what y'all like. originally seen by me on Dooce.com