You know, I think there is or are at least one or two things (maybe more) that will hold our attention regardless of how long we are at it. Like when I am making art, I have to tear myself away from it to take care of life's necessities. I don't even want to stop and eat when I'm really involved in making something. I suspect that is true for all of us, but just that many of us have not really found what our passions are.
TPBM is considering what we can do to help more people find their passion(s) at an early age.