I remember reading once about how Astrid Lindgren's children's books were supreme exactly because she - contrary to many others - remembers what it is like to be a child. Not just what you did or thought when you were a child - how it felt. The endless curiosity and appreciation for what in an adult's eyes is trivial is really a special thing I hope most people carry throughout their lives. On the other hand, children also understand more than one would normally think, essentially a Moravec's paradox but in relation to adults.
"Children heal the soul" - Dostoevsky