Unlike last year's Earth Day release, 'Earth,' or 'March of the Penguins' or the filmmaker's previous documentary, 'Winged Migration,' 'Oceans' doesn't follow a particular story arc. It's very broad in focus, showing you a little bit about a lot of different oceanic creatures, habitats and concerns, as opposed to letting audiences concentrate on a particular aspect of the ocean. With such a vast subject, the documentary (and Brosnan's occasionally overly-ponderous narration), while beautiful and amazing, can also lose jittery kids. Preschoolers in particular may think it's snoozy in some sections and scary in others. Mature kids (say 6 and up) with an interest in science and decent attention spans, however, will delight in the spectacle that is the sea.