It sounded like this:
Ayow yo Dada.
I remember it like I remember the first time you ran to me as I walked in the front door after work. This time I was walking to the door, leaving for an overnight trip. I had already kissed you goodbye while you were preoccupied with one of your books on the couch. Before I got to the front of the house, you came running, knowing that I was leaving. So I hugged and kissed you again. Then as your mom stood in the doorway holding your sister, I walked outside. Before the glass door shut, you said it. I couldn't help but stop and smile. When I looked back you were waving at me and smiling too. I had to respond. I couldn't let those words go unacknowledged. So I blew you a kiss. We'd never done that before, but you caught on and returned it.
As I drove down I-95, I could think only of that moment. You saying those words was another one of those moments that will stick with me forever. There will be days when I need those memories. We all have them. Days that are long or difficult, tiring or frustrating. On those days, I'll pull out memories like this, and think about how much I love you too.