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.
Yeah, you're true. Bitcoin is difficult to explain.
But, as long as you are still patient, you can explain make children understand what you have explain.
As an example : Now i'm 14. I know bitcoin since i was 13. Its hard to learn about bitcoin so that i quit learning. But, i saw a good investing way through bitcoin. I was interested again on bitcoin and i learn hard. Now i have enough knowledge to invest and start generating money for my future.
So, i can conclude that we can explain bitcoin to children a piece first, then a bigger parts, more detail detail, and the last is everyhing. We also have to explain with good explanation that can make children interested.