Kids today know way more than you think they do, with the Internet and 500 TV channels.
But while mum and dad were incredibly caring, it was also a very chaotic household where everyone fought about everything. So I know what it's like to internalize all that chaos.
When I did plays in high school and college, I never remember memorizing my lines, but once I had blocking, I had all my lines memorized. Once I had movement associated with words, it was fine. Before I had blocking, it was just text on a page. Once it became embodied, it was much easier.