Really great idea. And not going to ding it for kicking off with an LLM. But it might be worth thinking about how you could build a community of human contributors in a future stage. I personally don't feel comfortable with handing AI-generated stuff over to the kids in my life, and I imagine that would be a big barrier for your project as many others share this sentiment. That's a shame because encouraging kids to think deeply from a young age is something I would deeply support.
There are tons of knowledgeable teachers out there, and they are very often motivated to help the next generations thrive and grow beyond their day job. I'm sure you could find people to help with editorial work on this version to give it a human stamp of approval, and involve the many talented and inspiring educators and communicators that are out there to help grow this into a true value for the next generation.
Either way. Good luck!