My first official phone conversation with Seth

Tonight while I was at work, I called home to check on Seth. He's been pretty excited the past few weeks when I've called, but the most I've gotten out of him is some audible breaths and a "mom" or two. Nathan was telling me that Seth had colored in his library book. Seth then got on the phone and said, "Mom? Mom? Mom?" And then he said, "book" I said, "What happened to the book?" and he said "Uh-oh!", then gave the phone back to Nathan. Counts as a conversation to me! He's been quite the snitch lately, but he hasn't figured out it's not an "uh-oh" if he's being naughty and does it on purpose!