Following a conversation about how she is “big enough to be expected to share my attention” with other people:
Rooby: I have a very good question.
Me: What is it?
Rooby: If I’m big now, why do I have to do whatever you say?
Me: Well, growing up is a process. So now you’re big enough to do some things but not yet big enough to do others.
Rooby: Like cross the street by myself, or put out fires…
Me: Uh, right.
Rooby: Or go surfing.