Its not easy for a kid to absorb all your teachings about bitcoin. Me as a student, I read read and read articles about bitcoin but still I cant absorb all the informations i've read so what about for the kid? I think its better to teach bitcoin to those people who are really willing to learn
It is not that much difficult for them. Today's generations kids are smart enough to learn anything and their are various new type of teaching methods are discovered which help them to teach anything
. I think Bitcoin is a new and interesting thing for them. Although it is a complicated thing but if you teach then in a proper way they will get benefits from it. You can teach children about Bitcoin by organising different Bitcoin campaign etc. Children are love to use smartphone gaming applications, if you create them such app for them they will get benefit. Bitcoin is the thing which makes them economic self independent in their future 
It was actually depends on the kid if he/she is interested or not, some of the kids are stubborn and they only want to play so we should introduce them on cryptocurrency at the right age or else they will just neglect us. What we can only teach on our kids is to save money while they are young.