Kids is hard to teach when they don't understand what we are saying wasting time to teach them is like your teaching a dog to spoke. Kids brain is they wanted to play and play all the time you can't force them to know everything about bitcoin also they will knew about gambling if you do taught them trust me don't ever let kids use bitcoins.
You're right. Children are very difficult to teach something they do not want to know about. Therefore, they need to talk about bitkoin only when they ask you about it. And do not delve into the details, but just tell the basics