Zebedee and Thunder games is a good start. Get them playing and earning some sats. I pay my kids "allowance" in sats. If my oldest (12) helps me wash the car or fix something in the house, even if he is just passing me tools or holding a flashlight, I will give him some sats. I will play a jeopardy style trivia game with him in the car sometimes where I will give him 5 categories to pick from and he can win sats for every correct answer and then we will do a final jeopardy style questions where I will give him a category and he has to wager some of his sats. Whatever he amount he ends up with, usually around 100 sats in the end, I send to his zebedee wallet.

My little one is only 4 so she doesn't know too much about bitcoin, other than telling me she wants to buy it on my phone. haha.