Bitcoin is difficult to explain. I also felt difficulties in understanding bitcoin for the firs time. Let's share how to explain bitcoin to children of teenagers. In My country I can say 98% children don't know bitcoin. In fact, bitcoin can be future money. If the children not familiar with cryptocurrency or bitcoin, how can they face the digital era in the future.
Younger generations are computer lovers that is why they can easily understand especially when it comes to income generating. But they cannot do investments becs. Of lack of resources. Maybe they can start in a bounty campaign and from there they can learn by reading bitcointalk discussions.