Despite the bad rep they get in the media, pit bulls are generally big babies and are some of the most affectionate dogs I've ever encountered. The reason they tend to be associated with dog fighting and other such illegal activities are because they are a powerful breed, and originally that is what they were bred for, though their temperament has since been selectively bred for a companion animal. As with any dog of any size, children must always be supervised when they're around the dog, and young children need consistent parental guidance on how to treat the dog. Any animal that gets startled or hurt has the potential to attack that which has started or frightened it, and small children can often find these triggers...especially since many animals are wary of another animal's young anyway, and may already be on edge until they're used to the kids. With a new dog, keep it restrained during the first few meetings with your kids to make sure it reacts well to them, and then always keep a watchful eye on their interactions and don't let the kids pull on the dog, hit it, stomp or scream around it, etc. All dogs can and will bite with the right triggers, and all can cause some major damage if that happens, but powerful breeds can cause more damage much more quickly so they do require a bit more vigilance.