The twins have definitely started interacting with each other more in the past month. They sit next to each other to eat solid food, so meals sometimes takes a backseat to conversations like this one.
Mark says, "This is the first time I've seen them really interact with one another and maybe try to communicate. But if you just heard the audio you might think it was a cat fight. Also, YouTube video compression was not kind-- the original looks a lot nicer."
This was taken yesterday, 8/13/10.