I agree with alani123, How old are your kids ? If they under 15 years old, better focus on their school. Because i think it's too early to think that. And you can guide them like investing or trading.
10 yeard old. And yes i know they have to study.. but since they have free time and can "play" games [i said which] or watch LOADS of youtube on the side - they could also make some "internet money" and possibly understand how it works