Teaching children about Bitcoin is certainly commendable because it is very important for the future but since Bitcoin is an economic subject I don't think a child studying in class six will show interest in this subject. Because at this time his only thought is to go to that school and come home to play and he will not have any concern about economic matters because he knows that at any time any amount of money or food or toys will be given to him by his parents whenever he wants. However if op can teach his child about Bitcoin at this time then of course it would be commendable but I don't think it is very important to teach now at least the child should be 15-16 years old to teach about this then the child can be taught the subjects properly
But they are called kids for a reason, and I feel like age should determine that because when they get to a certain age, and it is introduced, they will take it more seriously than teaching kids what they don't need at that moment, and it is likely for them to just get to a certain age. Now I know some people will say they love Bitcoin, but they should do better than what they are doing now, and just allow kids to learn their basics in school and play.
We all want our kids to be familiar with Bitcoin, but at the right age, because you cannot even be worrying about that, because even when you introduce it to them, they don't have anything to offer at that point. It is more likely for them to have interest in the future, and not all kids might even have interest, so we all should be calm and just allow everything to play out in its own way because you don't have a choice but to just follow.