The National Museum of American History is one of my favorite Smithsonians--like all of the others, it is free to enter. They have a lot of really neat American history to see--one of my favorites is an exhibit on the White House and presidential life, with a collection of dresses worn by first ladies. It's a great place to visit to learn more about our country for both children and adults--and is much more fun to learn from than a textbook!
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