I like this idea, and I don't.

On the one hand, it's a good use of tech, would benefit kids in helping them to learn a wider range of subjects.

On the other, it would stop them needing to read - which is still important, no matter how much tech can read to us/for us. I have a five year old, and I don't think I'd go this route - I'd prefer that she learn to read at the same time she learns about the things which interest her. It could be on a device, or a [sorry] book [/not sorry].