I think we can start explain bitcoin by tell them that bitcoin is like other international currencies dollar, euro and many else. They will understand and you explain more about bitcoin.
I think its unnecessarily needed for a teen or a child to know bitcoin, at young age are you going to set the fact that wuthout money people are nothing ? Not being drastically emotional, butwhat I mean is bitcoin is too techy for a child to understand let them know it soon at their right age where in they can manage their time unlike being a kid , we should not expect them to learn everything we want them to to know and as well as theyre too young.