This video is from a wonderful little site called The Fun Theory, it describes itself as:
" a site dedicated to the thought that something as simple as fun is the easiest way to change people’s behaviour for the better. Be it for yourself, for the environment, or for something entirely different, the only thing that matters is that it’s change for the better."
I love the ideas they have, this is one of my favourites. So awesome I can hardly get over it.