I would say that Labs, Retrievers and Shephards would all be a good choice and at least in my experience are good with children. The Shephard may tend to be a little more protective of a child, assuming it bonds with the child. Again, my belief with questions like this is that it is more to do with the raising of the dog than the breed of the dog. I would think it would be better to adopt a young dog that could be brought up around children, or an older dog that is KNOWN to have been good with, and had good experiences, with children.