LOCATED FOUR BLOCKS from the White House, the National Archives are best known as the home of the Constitution and the Declaration of Independence. The two founding documents are beautifully displayed in the Rotunda for the Charters of Freedom. Every day tourists line up for the exhibit, and after they’re done, some step into the Archives Shop on their way out. Most of what you find in the Archives Shop is what you would expect in a kitschy modern museum store. Reproductions of Confederate currency are on sale next to Lewis and Clark action figures (the set includes a bonus figure–Sacagawea!) and snow globes with a picture of Nixon greeting Elvis. There are T-shirts and posters and, of course, books.