Possessive

Samantha is in the "mine" stage. 

THAT'S MINE!
THAT'S MY DOLLY.
MY BREAKFAST.
THAT'S MY SHIRT.
THAT'S MY JINX.

We love her awareness of this concept, and we actually encourage her to identify the things that truly are hers.  Of course, she tries to claim everything in the universe as hers.  This morning she was holding a magnet with the letter "O" on it, and saying, OH, OH.  I said, "Isn't it interesting that when you make the sound of the letter 'O' your mouth makes the shape of it?"  Then I demonstrated a few times: "Oh."  And then Adam started saying it too: "Oh."

Sam said, HEY! THAT'S MY SOUND.