In today's children are very easy to teach especially when it comes to online they can easily learn. You just teach them about bitcoin and how to earn it is easy just to tell them that bitcoin is cryptocurrency that you can convert it into cash and you just guide them right until they learn.
I agree that kids are easy to teach especially operating computers and gadgets, but there are certain things where kids knowledge is very limited. That is why they need to have a grasp of basic learnings on academic stuff. And that is why they should focus on their schoolings first than getting cents from faucets or games. Would you exchange the future of your kids to a merely cents because it is about Bitcoin?