Can start by teaching some faucet of the android games app, we don't have to direct them to earnings first, point them to the fun and comfort. If directly taught to create an account on this forum will obviously cause concerns about gambling and some things that are very risky about investing.
No need to direct into earnings, later they will realize that they will earn. Teach them the foundamentals, some history and if you know how to program, teach them some languages, and hardware and someware knowledge, kids flexibility of mind is sharp so they will learn. Then they will have a solid foundamentals and will learn how the world of digitals work. Don't chase the money let money chases you. And nice don't forget the fun they really need that, if they are feeling pressured play games.
I'm in a situation now where my little sister is asking me about bitcoin. And I told her that she can try to claim satoshi with many faucets. In my opinion, it's he easiest way of teaching kids about bitcoin. Teach them on how they will claim satoshi because it's the easiest way of earning bitcoin that they can learn.
That is partially true because I've started in faucets too, through time when they are not satisfied with the amount they will crave to learn more how to earn BTC. If you're sister or brother have someone average intelligence or good at a young age teach them programming, its a very good background no matter what course are you in.
The illiterate of the 21st century will not be those who cannot read and write, but those who cannot learn, unlearn, and relearn – Alvin Toffle