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.
Explaining bitcoin in teenager or children are very hard and if you dont have a proof or good information about bitcoin but if you teach carefully and explain well maybe they can understand the bitcoin.