I have to ask whether or not you actually have kids?

There is a significant difference in the development of a child's verbal ability when they are read to by a caretaker vs. watching the exact same thing on a screen. One is an active process, one is passive, and it engages them differently.

You can even tell by listening to a child talk whether they watch a lot of TV or not. There is a specific accent that they pick up, which basically amounts to a lack of enunciation.

Now, all that being said. I think your idea would make money. I thank many parents would love it.

But I think if you are not prepared to be abhorred by child development professionals, you should think again.