Parents need to know that while The Boxtrolls isn't quite as supernaturally creepy as the filmmakers' previous movies, Coraline and ParaNorman, it still has a lot of peril, tense moments, and a very unpleasant villain. Sympathetic characters are presumed dead at different points, a crying baby is carried away in the middle of the night, and the bad guy is bent on total extermination of the boxtrolls, painting them as bloodthirsty monsters, even though they're really peace-loving tinkerers. His extermination machine is loud, scary, fiery, and destructive, and he looks positively unhinged when he gets riled up. The movie may be animated (stop-motion), but it's really too intense for younger kids (especially when seen in 3-D). Characters are constantly in danger, whether from their own or others' actions, and there are some upsetting separations. One character has a significant food allergy that plays a key role in the plot; his reaction is very exaggerated, but it could strike a chord for kids and families who deal with allergies. There's not much in the way of language (one "oh my God"), but a character does wear a low-cut gown and fishnet stockings. All of that said, the movie offers a brave main character in the form of loyal, inventive Eggs, as well as positive messages about tolerance, family, standing up for yourself, and fighting for what's right.