The latest family-friendly documentary from Disney’s Disneynature label, following Earth, Oceans, African Cats and Chimpanzees, is mainly an adorably cuddly adventure. It follows a mama bear named Sky and her two cubs, Scout and Amber, as they dig out from their snowy cave in the Alaskan wilderness and head down the mountain in search of food. Perils do await them, though, from larger and hungrier bears and wolves to rising water and the threat of starvation. (If you and your family have seen African Cats, with its bloody zebra mauling, nothing nearly so gory happens here.) There are a couple of tense moments but John C. Reilly’s amiable narration lets you know everything will be all right. And the film is beautifully, intimately shot, so it’s at least worthwhile from a visual perspective. Fine for all ages.