I know many breeders won't sell to families with small children, and I think this is a good rule of thumb, but there are always exceptions. I know many members here have small children, and it seems to be working out fine. Looking back when I was raising my boys, I really believe they would have been pretty good with a Yorkie in the house, but some of their friends, who played at our house, would not have been good with Yorkies. It was hard to teach some of them, not to run in the house, some had ADD and just didn't seem to be able to control their actions. The opening and closing of the front door would have been another concern of mine. I personally think there are breeds that are better with children. It just depends on the family, but if I were choosing one for a family, I think I’d want one that’s a little bigger, so that jumping off the couch wouldn’t be a major concern. Yorkies are perfect for an empty nester though!
