The newer ones are way "spiced up" with chase scenes, spooky animals, etc. Id judge (with vague memory) at least as scary as Harry Potter. The second one has a whole awful failed battle added in, right? The old miniseries or ancient cartoon might be better. That said, we watched just the first with DD, probably when she was five, as she enjoyed the first two or so books. But she only gets scared by movies when there's the "waiting for someone to find out/see/discovrr someone/thing". That kind of extreme tension. Chases etc dont scare her. But then again, Tilda freaked her out, lol.