No worries Nolu, lol.
On the original subject of the thread, are we talking about good with any child, or good with the children of the family?
I agree with what has been said about over 15 lbs. It seems like caution should be used with one person/one family guardian breeds, as they can mistake children rough-housing with friends for children being mauled and attacked by friends, and gosh they need defending.
One time I was playing chase with my cousins and they had a huge afghan hound named Rang. Best dog ever and fantastic with kids. Some of their friends were over, and one was chasing us. Well, Rang got worried, really worried, and decided to step in. He tripped her and then sat on top of her and wouldn't let her get up to chase us. We had to get my uncle to tell him it was ok. This goes to show why it is so important to socialize and train dogs though. If Rang hadn't been worked with like he was, he might have gone overboard trying to protect us and bitten someone where a bite was not called for. As it was, the girl was just a bit shaken and nobody was hurt.