I don't get all the 'not meant for kids' talk.
I have seen this movie multiple times. I would agree that this movie has a lot of depth that adults can get out of it, but it's also got a lot for kids too. I watched this movie with my girlfriend and her 4 year old. There were parts that were scary for the kid, there were parts were funny, and parts that were sad. But none of them inappropriate for children.
At the end of the movie it had both my girlfriend her daughter in tears. It's been almost a year since we watched it, and the kid has brought up the movie multiple times, talking about the characters, wanting to read the book, and also wanting to watch the movie.
I think this movie resonates with children more than most people give it for. On top of that, if you love the imagination of your kid, or just child like in general, this movie hits so many spots.
Super underrated film in my opinion.