Mine is younger and I don't have experience with 10yo, but I'll say this: Present the material to them, and give them time to discover and absorb on their own, don't let bitcoin override their current interests. When they're ready, you'll know.

I bought this book for my little one in 2021, to practice reading and having casual conversations on the subject. We don't talk about it daily, but when we do, it's usually when we're betting on something, sats is our default unit of account