A conversation.
It is a funny thing to have children at different ages. Age difference becomes specifically obvious in the realm of speech development. Samuel is now a three year old with a conversation level vocabulary. He can answer questions appropriately, and interact with you through discourse. We have become used to this level of interaction with our offspring.
See the thing is that the modus operendi of sweet little Abigail is mostly dahdahdahdahs, mamamamamas, and hoooohhs(with slobber).
So I sat down with her the other day:
ME: So...how is all this going here? Do you like it?
ABI: Dadadadadamamamama.
ME: Yeah, that's cool.
ABI: (non-verbal and trying to eat a dolls head)
ME: Good talk Sweety.