"What's that?"

Dylan has been saying it for a couple weeks now, but we weren't sure if he knew what it meant. This morning (6:30am!) we were sitting in his room nursing and a train was going through Pontiac blowing its whistle. He looks up at me, points toward the window and said "what's that?" with a big smile on his face. lol He's so stinkin' cute! And he started saying "cacker" for cracker. He's growing so fast.