It's useless. Unless they're a fucking genius then the kid is going to be clueless. I bet it's something that could be taught in a high school class.
Kids is not the kid you are thinking which are maybe below 10 years of age, kids nowadays are smart and they are very devoted to what they are doing when they love it. I believe bitcoin is also good for them but if they are still minors, they need the right guidance from their parents since in the crypto world, there is full freedom and good and bad can be access.
It is complete freedom that stops me from telling children about bitcoins. I would not want my child to anonymously make forbidden purchases on the Internet