It trully is a waste of time. They will never understand it. Kids and teenagers don't want to hear about how a currency works or any of the details, they will find it boring, they can't be bothered, most adults can't, let alone kids and teens, let's just focus on making bitcoin work as expected by casual people.
But if you leave the teenagers and kids from focusing on improving bitcoin how do you carry the young ones along ? You can't be doing that without the involvement of young people because they are the ones to replace you tomorrow. For sure, a way to put them through must be created to solve any possible future challenges so that we could have better system for bitcoins.
In the contrary, we should invest time to teach them this amazing technology. The children are the one who will replace us and use it in the future.
Mostly, lot of them will learn it by themselves, but we need to educate them and give financial literacy, so they will make better financial decision.