How aged are you? How childlike are you? Which is the better cross-question?

?How aged are you? How childlike are you? Which is the better cross-question?
Usually, it is a bit rude to ask an older soul about their age. If the human being is on the older side, ask how childish they are. If they are on the younger side, ask how old they are.
Well, I use it on the in front of. I ask an older character how young they are... and ask a younger personage how old they are.
It make each surface better about their age... and it's give a good snigger with the elder folk. :)