A Volkswagen initiative called The Fun Theory is setting out to prove that people’s behavior can be changed for the better by making mundane activities fun. In a recent experiment, they set up musical piano steps on the staircase of a Stockholm, Sweden subway station to see if more people would be more willing to choose the healthier option and take the stairs instead of the escalator. That day, 66 percent more people took the stairs than usual, proving that fun is the best way to get people to change their ways.