Have you ever seen the movie Big starring Tom Hanks and Robert Loggia? Do you remember the funny, yet touching scene at the FAO Schwarz store in New York City where they play a duet together on a foot-operated electronic keyboard?
If you had a choice between taking an escalator or playing a piano with your feet while climbing up steps, would you prefer? My vote would be to run up the stairs for an aerobic workout.
Take a look at what the Swedes did to encourage people to do this and have fun: