The great dream merchant Disney was a success because make-believe was what everyone seemed to need in a spiritually empty land.
But I think the children of actors share a certain pragmatic approach. One is denied some of that 'running away with the circus' element of being an actor.
It's fun to be there with the guys, to practice with them, arrange the balls, do this, do that, but when you play you can get some of this nervousness out of your system.

