Agree with this. Sometimes Kids more creative than adults. Since they still pure and haven't programmed by soceity to think 'inside' the box like adults .
the story itself must not containing something harmful for the kids (porn, brutality, etc)
My games are pretty kid friendly despite of how the characters look in them. Still I wonder how kid comprehends a comedic stuff.
To be relevant to this thread. I try to avoid confusing players by writing dialogue and stuff that it is not spoon fed but still is informative for the player but without making dialogue to sound like it is made only to explain stuff for the player. Basically characters talk whatever they want and it happens to contain information sometimes related to the world they live in.