Hey, you have some good ideas. I have been thinking about the 8th season, and I think the writers need to start thinking of children on the show. I know that "Penny" or "Bernadette" will be getting pregnant soon. This makes it awkward having an infant around for two years that can't talk. But what if while Bernadette is pregnant, there is a knock on the door, and behind it is a blonde percosious 4 year old boy saying "I think your my Mommy". She could have donated an egg five years ago for stem cell research, and an unscrupulous female tech took her egg and fertilized it with sperm from a "Nobel Prize winner" and inseminated herself. But now she does not want the child anymore because the boy is too darn smart, and should be with his real mother.
This would help the show greatly. Not adding just an infant, but adding an infant and a small child as well. This would allow dialog opportunity for the new family.