I saw this video today and it got me thinking. The premise is that something as simple as fun is the easiest way to change people's behavior for the better. In this case -taking the stairs instead of the escalator.
It's true, isn't it? As a math teacher I do it all the time. It's not always easy to turn around a bad attitude regarding math, but bring out the jump ropes, paints, and blocks (and I'm not talking about for the little kids), and suddenly I'm hearing "When can we do this again?" We hope our toddlers get out of diapers by giving them a target to hit or rewarding them with M&Ms. We sit down to fold laundry and turn on a good movie to keep us entertained. Even Cinderella whistled while she worked.
I think Volkswagen has it right: If you want make a change in people's behavior, make it fun!