In my own opinion. No rules of bitcoin exist that kids are not allowed. So why we dont teach our young children or kids early as much as posible. As long as they can read and write and can understand dialict.We know our young age is theme future of our country so we must teach early for the good benifits of them.
When teaching anything I always do it in baby steps, bitcoin is too revolutionary that even now not a lot of people don't understand it, so I will probably start teaching them about fiat, first I will teach them how to save money in order to get the things that they really want, then the history of money, gold and silver, fiat, and then bitcoin, I will probably add things like money supply and stuff like that in my explanations.