It is not right to teach bitcoin to kids because they are too young to handle money and they are more interested in playing. Being a kid is fun but its short so let them enjoy their childhood.
I am also agreeing to others that we should teach bitcoin to teens instead. Because I am one of the teens that got interested in bitcoin tho there is only one year left before I reach the the legal age.
Apparently there are also kids that do not enjoy their childhood because of the bullies, parents separation, etc. Not every kid has an enjoyable childhood and I think most of us had some bad experience in childhood. It's not all fun for some of us.
In your case, you were working through the use of bitcoin even before you finish teenage stage. There are also kids out there that has to work even though their age are far from being appropriate. Most of them work for small-scale fast food chains and gets adopted by the owner. That's often the case in my country. In other places, kids are baby sitting the child of their neighbor, mowing the lawn, etc.
What I mean here is that its also important that you introduce your kids into doing bitcoins because you don't know when are you going to die as a parent. If you did die and your kid has to work on his own, then bitcoin might be his key to support himself. I know that the kid is supposed to be adopted by the immediate relatives of the parent but that's not always the case. Consider introducing bitcoin to your kid as your back up plan for him just in case you die or get separated for some reason.