Written and directed by: Brad Bird (You know this man from his movies The Incredibles, Toy Story 3, and UP).
Plot: Way back in the fifties, a boy named Hogarth Hughes finds a giant gentle robot and they become friends. It's a time when everyone was worried about "the bomb" and when they find out about the robot they send Kent Mansley (works for the government) to investigate. He's pompous, inconsiderate, but pretty sharp. If he finds the iron giant, he'll get the army to blow it up. Hogarth won't stop until his friend is saved.
Almost any age can enjoy this. I'd start letting them watch it around four as there are some worrying things like the fact that a rocket is going to blow up the town, the giant robot eats part of a power station, and there's a few scenes of terrified townspeople that might not be understood by younger kids. Also, it's not really written for little ones and they'd probably be bored before they were scared. As I am an adult who still loves this movie, I wouldn't say there was a cap for it but it's really well suited to seven to ten year olds who still love cartoons. I added that last bit because sometimes I'm sad at how quickly children are told or think they have to grow up. When we decide we're too old for something as fun as this is when we're really being childish.
I love this scene. Dean (Harry Connick Jr.) has a squirrel going up the inside of his pant leg and Hogarth doesn't want his mother (Jennifer Aniston) to know that he brought a squirrel into the diner.HERE.
A quote from Brad Bird:
"I reject that whole point of view - that animation is a children's medium. The way people talk about it is, well, hey, it's a good thing I have kids, because now I get to see this. Well, hey, no, man! You can just go and see it. There's no other art form that is defined in such a narrow way. It's narrowminded, and I can't wait for it to die."
Look up more about him on IMDB right HERE!