Great place for everyone interested in spying culture. In the museum shop you can find a lot of great gadgets and toys. They also do have a great library of books about spying, encodings in real-life, Masons and many more.
In my humble opinion bellow you can find everything a junior spy should have 
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- Weekly Mustaches
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- Mega Browns
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- Notable Moustaches
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- Mustaches
sounds fun
where is it?
Ouch, forgot to mention. It’s located on the intersection of F street with 9th in Washington D.C.