I honestly am not sure. She was talking so much from such a young age. It was all nonsense, complete babble, but sometimes she would say something and I had to stop and think about it. Did she say a word? Is this just a coincidence? Does she understand it? The words just faded in as the nonsense faded out. It seemed like a progression, not an event.
He's gotten a lot of mileage out of it. For a while it meant the obvious but also "open", "apple", "out" and "outside" until he figured out how to make more consonant sounds.
"hey" literally as soon as I held him for the first time the day he was born.
I know it wasn't intentional, and probably won't count but the memory will last forever.