We took a group of kids to see this and the 8 year olds and older seemed fine with it, but most of the younger kids were disturbed by the fast-paced non-stop action scenes containing violence and mean words.
I took two of the 6 year olds out of the movie when one started crying after the captured penguins (in jail) asked "are you going to kill us" and the villain responded with "i'm not going to kill you, what i'm going to do to you is WORSE than killing you."
There were lots of explosions and fighting, along with non-stop mean banter. Not much redeeming in this one, at least for the younger crowd. The adults didn't think the story was worth watching either.