I agree about letting them tell you what movies and books are appropriate for them. We can still only watch Finding Nemo with my DS4.5 if we fast forward through most of it. He has just gotten to be ok with Peanuts movies, but most full length movies are too scary. There are even episodes of Clifford or Paw Patrol he won't watch. Interestingly, in the last year he has shown a lot of tolerance for some scary nature videos (like a lion taking down and eating a prey animal) that even I find uncomfortable, but he is very matter of fact about it. There is something about fictional peril that is scarier. He also doesn't like to watch fictional characters making mistakes and getting into trouble. But we have seen slow progress in his tolerance over time and I have other friends with similar kids.