For me at age 10 my children should understand the market and how it works, interpreting chats and deciding the next move of each coin from studying the price action of different coins. At age 13 the should start trading with a demo account and at age 15 they should have funded their first account. This would help them become financially independent, also help then limit future gambling prowess and also make them prepared for their careers
My oldest son is 10 years old and while his thinking (and math) is very good, he doesn't have the maturity for this.
Fake moves, FUD, all this can easily surprise ca kid at this age. So no, I think that at 10 years he cannot understand fully all the charts would show.
I can't tell for the 13-15 years steps, but imho you're rushing it. And a child needs to enjoy his childhood; he has plenty of time later to think on how he can earn more money.
I even think that me and my child would have serious problems if he was gonna trade. Not only kid but even people in their 30s and 40s are gettting hyped and excited by the volatility of the crypto market and the additional option of leverage and/or futures trading with up to 100x leverage. This is easily turned into gambling and this gambling is really 100x more riskier than the traditional one.
If my kid would research market and make investment in altcoins instead of trading, then I would be okay but day trading and looking constantly at charts, beeing awake at 6 am because of market, etc, is very unacceptable for me.