I think it'll be hard for us to teach kids and for them to understand what bitcoin is for their very young age. Even adult people who are close minded and are afraid to try something new wouldn't find it easy. Kids live to play all the time. I think there's a right time for them to learn about bitcoin. Let's just allow them to enjoy their childhood without any preassure.
Kids are not into earning something, instead they want to learn things that they know could satisfy them. Usually those are foods and some good fantasy movies, that would make them imagine something magical could really happen.
I think a movies with bitcoin or a food sold on the street and you swipe with your qr could make them wonder and think what you have done.