If you live near by W. DC go for a visit
Unfortunately, I don’t 
Location:
"The Marian Koshland Science Museum is located in NW Washington, DC at the corner of 6th and E Streets, NW. It is near the National Mall, the MCI Center and the National Building Museum. The closest Metro stations are: Gallery Place/Chinatown, served by the Red, Green, and Yellow lines; and Judiciary Square, served by the Red line."
http://www.koshlandsciencemuseum.org/