Who's that Mowing Our Grass Mom?

Our wonderful yard men pulled up this afternoon just as we were finishing up lunch, so I rolled Brooks and Burkley on over to the window to watch our lawn get mowed from their highchairs. And...they are LOVING it (they are still watching them as I type this post). I'm cracking up because they are having their own little conversations and they both will start laughing or squealing! I wonder what they are saying?!?!?