Comment by uranium

That's a great list; while not explicitly writing them out, we raise our kids by similar rules, and I think it's been a huge help. #1 is huge. We also explicitly answer any question they ask (barring privacy concerns). The answers vary based on how old they are, and what they're capable of understanding, but they can always ask for more detail if we guess wrong. It lets them know that there are no taboo subjects with us, and they can always come to us with their hard questions.

It did mean nuanced conversations about how not to ruin the "Santa Clause game" for other kids, etc.