Honestly I don't think bitcoin is in the position as of yet to need to be thought to children. By children I am guessing you are referring to ages like 5-10. There are much more important things children need to be thought at this age. Even if you don't agree with that bitcoin is just not an important enough topic to be discussed at much a young age.
how so, bitcoin could be potentially the new economic system, it is a very important topic, depend on how you view it, obvious if you think that bitcoin has no future, then it is normal for you to give less importance, but for many other it has a great value, and their kids should know about it
new generations should discourage their children from using a corrupted system like fiat and embrace bitcoin instead