The movie is a creatively written and performed pseudo-documentary on a surfing penguin. The characters are all very strong and well-written. What makes this movie really excellent, though, is that the main characters are all extremely positive role models. Of course, every film needs an antagonist, but it is very clear that this film's antagonist is NOT a role model. The beautiful thing is, the main character learns a valuable lesson, while competing with the film's antagonist.
While the movie does have a lot of so-called "potty humor", unless you bubble-wrap your children, they have heard MUCH worse, at school - regardless their age. The only really questionable line is when the lead character calls the antagonist a "p****r head". In this case, I'm sure that refers to the fact that the antagonist is also a penguin, therefore has a beak, but the double-meaning is very clear.
There also seems to be a huge misunderstanding with a certain line that many have, somehow, interpreted as "go cut yourself". This is certainly NOT said, in the movie. The line that is referenced involves the male and female lead characters grabbing large leafs. The male lead asks, "What is this for?" The female replies, "You don't want to cut yourself, do you?". Then, they proceed to slide down a roller coaster-like, underground tunnel system, using the leafs as a sort of sled, protecting them from being cut on the rocks on which they are sliding. That said, do not listen to those who claim that the line "go cut yourself" is present. Those who claim that line is present, in the movie, obviously did not give the movie their full attention.
Over all, a very funny and well-written movie, in which some really huge life lessons can be learned. I highly recommend it!