You'll spend the bulk of your day two miles downtown around the Mall at family-friendly highlights like the National Air and Space Museum. Take the 90-minute guided tour to see the lunar capsule that carried Neil Armstrong, Buzz Aldrin, and Michael Collins to the moon, the original 1903 Wright Brothers airplane, the first passenger jet, the DC-3 used by Eastern Air Line in 1936, and a small plane that some crazed inventor pedaled across the English Channel.
At the recently renovated National Museum of American History, kids will find intriguing tidbits of Americana on display, including the top hat Abraham Lincoln wore when he was shot, a Babe Ruth autographed baseball, the original R2D2 and C3PO, Dorothy's shoes from the Wizard of Oz, and George Washington's uniform. Afterwards, stroll over to the National Portrait Gallery to see the artistic renderings of all the presidents. There's Gilbert Stuart's famous painting of George Washington, a close-up of Richard Nixon done by none other than Norman Rockwell, and an almost abstract offering of JFK, created by Elaine de Kooning. The National Portrait Cafe houses a nice indoor courtyard where the children like to jump across a shallow reflecting pool. Remember that most of the museums in Washington, DC, are free, so save that money for lunch and dinner.
Back at the Embassy Suites, you can swim in the indoor pool, located on the top floor of the building, work out in the fitness area, or go shopping nearby at Nordstrom Rack, Nieman Marcus, or Saks Fifth Avenue. Video rentals are available if you want to watch a film inside your room.