The family was invited to the White House for a speach from the President on September 8, 2008. The President invited all of the Presidential Greeters to the event.
I was a Presidential Greeter and you can read about it here
. See the photos here
We spent the entire weekend in Washington and went to the National Air and Space Museum (Steven F Udar-Hazy Center)
and George Washington's Mount Vernon Estate and Gardens