I probably wouldn't take a kid to see it. If I had kids I would be one of those dad's that wouldn't let my kid see alot of movies these days.
There are alot of sexual jokes with Tony hitting on women, and one sex scene with Tony (The woman is pantless), it doesn't last long, just them making out and it fades out.
As for the violence...There are gun shooting, explosives, and such in the middle east. There is no brutal violence that I can recall, mostly cool Iron man weapons fighting taking out the baddies. Come to think of it, its not that bad. I don't even recall any swearing.
NOTE: Make sure to stay past the credits.
