This is the task, I think, of a letter movement. But it should be set up only in states where a significant response can be achieved, for a letter movement necessarily presupposes a strong organization.
I mean, it's fine when you're a kid and someone runs into the playground and goes, 'I've got this great game of pretend,' and you play... As an actor, getting to play, getting to use your imagination and be childish - it is weird but it's wonderful.