99% better to learn here than him watching videos of "inluencers" or "experts" on various social media channels. Those crypto shilling and hype disguised as "contents" will reach him faster than you would expect so let him know about this forum. The sooner..the better.
At that age, it seems the best for them is to enjoy their childhood with their peers (like camping out in the backyard), they have a lot of time with their friends.
He's not going to spend most of his childhood learning crypto.
Keep up with the times. Most teenagers spend more time playing games on their mobile or PC than going out camping.