Familial/home Japanese

We have a bun in the oven and I want to at least attempt to give babby an early bilingual foundation. I'm looking for resources on familial/home Japanese. I want to familiarize myself with how parents and babies/children speak to each other. I'm probably looking for lessons or anime/manga with a focus on parent/child interaction. When I try to google this stuff, all I can find are things like "how to talk about your family to someone else".

As an example of the kinds of things I hope to learn, I'm currently wondering about the nuances of parental imperatives/orders/requests in Japanese. Would a parent normally say "Please brush your teeth / 歯を磨いてください", "brush your teeth / 歯を磨いて", "let's brush our teeth / 歯を磨きましょう", or something else?

A little more about my background: At one time, I could speak conversational Japanese. For the last handful of years my exposure has been limited to flashcards, a couple of learner podcasts (Shun, Teppei & Noriko), and anime with English subtitles.

by SuperDryShimbun