Title: X3: The Last Stand
MPAA Rating: PG-13
Plot Summary: A pharmaceutical company generates a "cure" for mutation. Some mutants embrace it, others protest it, and Magneto exploits the situation by forming an army, intent on destroying the source of the cure. Jean Grey, who "died" in the previous movie, is found alive, but unable to contain her power. The X-Men find themselves defending humans (not to mention the source of the very cure they despise) against Magneto's mutant militia. Ethical questions arise, but they are too numerous to detail.
Should your kids watch it? I do not recommend letting the little ones see this movie. Then you'd have to explain why that woman has her legs around that guy, and you don't want to go there with your six-year-old. I'd say 12 and up.
My opinion about this movie: Three words. IT. KICKS. ASS!
What, you want more yakking? Okay. This movie has the character relationships you like (although I think there could have been more exploration to this than was on the film). This movie has the fighting you action buffs want. This movie has some awesome special effects, and they don't even look fake (are you taking notes, George Lucas?) This movie has new, awesome mutations that freaked me right out. It has more famous mutants from Marvel Comics. Yeah, that's right, Juggernaut is there, along with ArchAngel, Colossus, Shadowcat (called Kitty here), and heaven knows who else. Forgive me, comic lovers, but it has been a good 12-15 years since I last read an X-Men comic, so I don't know the name of that dude who multiplies himself, and I can't remember it from watching the movie only once.
One more thing. When you see this movie, be sure to STAY to the END OF THE CREDITS. You will not be disappointed.