Go see "Iron Man" with your 10 year-old. He or she will leave the theater begging to be enrolled into an engineering/robotics program.
The engineering workstation sequences (in which Tony Stark develops the suit) were just jaw-droppingly cool.
Disappointment of the evening: Black Sabbath's song doesn't appear till the closing credits. Bah. I had always imagined an Act II montage showing Tony Stark prototyping and testing the suit, with this song blasting in the background.