@Mischance Precisely about children's TV: full of hype and stimulation. In fact, you could say the same about TV in general, which is one reason of many I hardly watch TV at all now. You used to get a moment of quiet while the credits rolled at the end; but now, it's straight into hyping up the next programme, in the usual "hysterical TV voice". And that any TV programme, from a comedy to a "serious" documentary, will be full of very rapid cuts from one scene to another, with no shot lasting more than a few seconds. It reflects people's attention spans.
You can see it in the way people make Youtube videos: the popular ones always begin with "Hey Guys!!!!" (usually said by several people in unison), the fast way of talking, even when explaining something, the constantly changing background shots.
The "screens are bad for children" thing is nothing new: in the 70s and 80s, television used to have a bad press for entertaining children. Although Roald Dahl is generally disliked on Mumsnet, perhaps he was right when the Oompa-Loompas sing about what television does to children:
It rots the senses in the head!
It kills imagination dead!
The brain becomes as soft as cheese!
His powers of thinking rust and freeze!
He cannot think! He only sees!
"All right!" you'll cry, "all right!" you'll say.
"But if we take the set away,
what shall we do to entertain
our darling children? Please explain!"
It then goes on to say how children used to read books before television was invented, and we should go back to those times.
Fill the shelves with lots of books
Ignoring all the dirty looks
The screams, the yells, the bites and kicks,
And children hitting you with sticks.
And that's another point: those Oompa-Loompa rhymes took up several pages each. Do children (or even adults) nowadays have the stamina to read them through? I remember hesitating to read them.