Great movie for Nim's island fans. I love this movie and I think that it is a wonderful sequel to the first movie. Which I recommend to watch the first movie first, because it will give you a feeling about how the sequel is going to go. If you didn't watch the first first, then you would be completely lost.
Anyway the movie is great. Some sex with flirting and even kissing. Mixed with all the violence, it is a superb movie! Nature included. I think this is a movie that all should watch, but overall I think 7+ will enjoy very much. If you plan to watch it with children younger than that make sure that they know what's coming ahead. I hope this review helped you!