I think someone could create a game about it , a game composed of story telling which as they progress they get to know more about different angles of bitcoin world which could be useful when they grew up 
I agree because kids are more focus on games than reading only few young who was interested on reading different article or books so if they would going to introuduce bitcoin through that it will be hard for them but if you put bitcoin in a game it may be more interesting to them. While they are enjoying they get knowledge about bitcoin so if they fully understand it they can used it wen they grow up