Nowadays, most kids spend 40-60% of their time playing video games. My elder brother as an example ( even though his not more a kid).
You want to know why kids love video games?
Here it is:
You and I know that kids love to explore right?
Those times when daddy or mummy will be going out and the kids will want to follow them, just to see and experience things outside the four walls of the home. That is exploring.
There are many ways kids explore, and parents do not let them in many cases.
Now
Video games are one part of exploration that parents find pleasing, safe, and little bit educational.
So the child is nw free in that aspect which is even very awesome because this time, he has the chance to explore alone, where no one would tell him "kelvin! Don't touch that!".
And that is why kids love phones and other similar devices too.
Now that is just what it's just all about. From experience.
And that is why smart inventors have gone ahead to create games and android apps that are very educational, to help children.