"Wow! Mommy's really letting me drink my water from a 'big boy' cup! I'm doing pretty well with it, too."
"Mmmm, water. I could get used to this 'big boy' stuff!"
"My shirt feels kinda funny, though. I wonder what's cold on my belly?"
"But, hey, it's all good! I did it! I really did it! Now I'm not thirsty anymore, though. I wonder what I should do with the rest of this water?"
"Oh! That's what felt so funny on my tummy! Water!"