Dude, it's ...like...air

So I had to post this quick before I forget.
Sam likes to sit over the A/C vents and wait for the air to come on. Today he was sitting in the A/C vent in the kitchen while Kate and I were eating a snack. I heard the A/c kick on and went to go see his reaction. He was all kicking and giggling in excitement when I see him blow like he's blowing out a candle. :) LOL Too cute. So I say "You like the air, don't you Sam? ". He looks at me and blows again. Again, too cute. So all I said the next time was "air" and Sam did it again. Could it be that my little non talker knows or understands more than he lets on? I think just maybe he does, just maybe.