How old were your babies when they started to coo and make noise in response to you? Or at what age are they expected to start?

My DD is 7 weeks on Tuesday and she has started to make little sounds when she smiles or when I talk "cutesie" to her. I LOVE it!

Jack started what we call "talking" at around 8 weeks. It's the cutest thing, also, don't be surprised if it doesn't really sound like "coo".