Fun Motivation

I like the idea of motivating people to do things by making them fun. This is a pretty brilliant advertising campaign by VW www.thefuntheory.com . Looks like it's mostly been deployed in Europe, they get all the creative adds. I would love to do something like the piano in one of the really long stairways in the subway in NYC. I also read something recently about how simple signs can motivate people to take the stairs. Something about posting signs at the "point of decision" directing people towards the stairs and talking about the benefits. I wonder if a similar program could be created for a computer, something that motivates students to study or do homework instead of going onto facebook. I'd use that! Some sort of reward for the length of time you manage to stay away from your vice sites. I know there are programs that will lock you out of certain sites, but this way would be more fun.