BeeSeeDub:
What I know was unintentionaly overlooked and not included in the member FiveOhNine's 'link' above, is that if you're going to take a guided tour of DC (U.S. Capitol, U.S. Supreme Court, Library of Congress, Jefferson Memorial, Shuttle to Arlington Cemetery [and the Changing of the Guard, ect...), with your family, most (if not all), tours leave from the Union (historic train station housing numerous tourist shops, restaurant and an upscale shopping mall), Station @ 50 Massachusetts Ave., NE Washington, DC 20002.
While you and your family is in the Union Station (shopping, eating, ect...), you can mosey on over to The Art of Shaving store (maybe even get a straight shave...note...this shop is kind of on the pricey $$$ 'upscale' side).