After a particularly adult-like fart:
Me: "That was a Daddy toot!"
Gavin: "No, that was a Gavin toot!"
Passing by the tarp-covered pool in our subdivision: "Summer is closed."
When measuring me with Daddy's measuring tape:
Me: "How tall am I?"
Gavin: "Bigger than me!"
On noticing his diaper was very saggy: "Oops! My butt fell out."
Pondering his size: "I little and big!"
On growing older: "When I bigger, I be a grown-up man!"
On my return from Russia: "Mommy! I been looking for you!"
On Thanksgiving Day:
Me: "Gavin, what are you thankful for? What makes you happy?"
Gavin: "My family!"