Bitcoin is hard to explain. I also experienced difficulties in understanding bitcoin for the first time. Let's share how to explain bitcoin to children of teenagers. In my country, I can say that 98% of children do not know bitcoin. In fact, bitcoin can be future money. If children are not familiar with cryptocurrency or bitcoin, how they might face the digital age in the future.
If you want to introduce bitcoin to your children, make it interesting and always get their attention. Keep in mind that children have short attention span, if you want to make it interesting, you can play a game and at the same time you are teaching them. It is up to you. First,introduce bitcoin, what it is and what will happen if they have done this kind of thing then proceed to the actual lesson. Do not teach them by chunks, come from the very basic, bit by bit and eventually they will learn.