Good movie but with a very thin story.
Spoiler alert: Is is a classic Disney where important relatives die. Be sure to be ready to explain this to your kid.
It is a good movie, but I do not believe that it is not going to become a longtime classic. Disney tried to hype it up quite a bit when it came out, but for me it was a bit of a let down when I saw it.
Some of the plot is a bit complex and also most of the technical stuff that Hiro invents just is too complex for the younger audience. However I think that when the kids get old enough to understand it, most of them will find the story too thin. In my opinion it falls between two chairs.
There will probably be a sequel, but I am not sure that I am going to watch it.