The Blockchain is so simple and yet 90% of the people still don't understand how it works.
It's just a bunch of independent computers,who verify transactions by solving complex math tasks.
For that work (solving complex math tasks),they get rewarded with bitcoins.This is also known as bitcoin mining.I guess that this is the most simple explanation of all times.
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
Great drawing, by the way.
After I read some of the comments from top to bottom, I think this is the simplest answer that ordinary people will be able to understand easily.
Very easy to digest for beginners and I don't think their interpretation will go wrong if they develop their own questions later.
So i will answer like yours if newbies ask me someday, bless you mate!