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 
Teaching kids about bitcoin is such a wise idea itself. It would be good money for an app developer to make educational bitcoin games for kids which help them learn more and have more fun too. A little puzzle, an open world game or just interactive game would be a nice idea.
If kids get to learn about basic economy first and learn about smart tactics of how to handle their money , they can prepare themselves for a more advanced lesson like about bitcoin. Today's kids are smarter and technologically swift. maybe it is a good time to start at early stages if you want them to further choose this subject as a choice.