> There's no need to "dumb down" anything ever, not even for children.

This is so wrong that I can't imagine you actually meant it in the way that it quite obviously reads like.

When my 3-year old just saw is favorite toy fall from the sofa because he put it in an .. unstable position, then obviously it won't help if I explain the theory of relativity to him, cause ultimately it was gravity causing the mess. It won't help either to "dumb it down" by only explaining Newton's mechanics. What he actually needs to understand is that things fall down. Why exactly can be explained later. Much later. When he goes to university perhaps, if he chooses to and still wants to know.