Neither being a kid to our parents nor being a parent to our kids.
It is the essence of innocence, which is overlooked, rather overpowered by the onset of 'maturity' in an individual's life.
What is maturity?
The first answer to that question, which springs up as a reflex action, is the mention of the phenomenon of adolescence.
Well, of course, it is the bodily changes which divert our attention the most, but let us save that discussion for another day.