When they have the idea of money, I will teach them how to use cryptocurrency to pay and teach them the knowledge of cryptocurrency. Many children already know cryptocurrency. When they are very young, I will teach them to pay in cryptocurrency, and when they are adults, I will teach them how to invest in cryptocurrency.
We better should wait to teach our children cryptocurrency trading when they have enough age to control their emotion.
Even we've heard famous story warren buffet start his investment from very young age but we cannot generalize all kids will have the same mentality, most kids are not mentally stable, they are stubborn and will do anything to get what they want, and it's' very dangerous in cryptocurrency trading because the market is too rude for kids.
So it's better to introduce what is trading is, how it done, and give them a practice account before we give them the real money to trade or invest.