brrmm brrmm brrmm. Its such a little boy noise. No longer the babble of an infant, but the sounds of a little boy at play. OK well its really more of a bwwww bwww sound, but you only make it when you are pushing along your little cars, or trucks, or buses or anything else with wheels. It is just so cute. You are growing up so fast.
I heard you say another new word for the first time yesterday. "oo" (as in pool). You say this when something catches you eye that interests you. It used to be a sucking air in noise, but yesterday it was more like a real word. I got this photo of you saying it today, as you saw a bird fly past. Its just so precious the way you learn a new sound or word, and then practice it over and over for days.