Mentioned by Santorini Dave
Washington, DC with Kids - 26 Best Tours & Things to Do
"The most popular museum on the mall is packed with exciting exhibits that trace the development of flight from the first Wright Brothers plane to SpaceShipOne, the first private piloted vehicle to reach space. Lots of exhibits are interactive (some even encourage climbing aboard), while sky shows at the Albert Einstein Planetarium and a 5-story high IMAX movie theater add to the attractions. Special family activities are offered regularly, including the chance to look through the museum’s giant telescopes; for young visitors, children’s storytimes and the film, One World One Sky: Big Bird’s Adventure, shown free in the Einstein Planetarium on selected days."