...How Malia and Sasha now know dad's home:
"Once someone on my staff e-mailed to tell me that the president was on his way. But you could already hear the helicopter, so it was like, well, no kidding."
"The girls don't move. I'm like, 'You want to see Daddy landing in the helicopter?' 'No, that's okay. We already saw it.'"
...
http://blogs.suntimes.com/sweet/2009/03/oprah_and_michelle_obama_white.html
It's really hard to impress kids these days.