The museum has both permanent and rotating exhibits, including robots, science puzzles, a
NOAA weather station, a timeline of atomic discoveries, a large
Van de Graaff generator, a display devoted to
nuclear weapons and the
Y-12 Plant, and a
solar energy demonstration project. Its flagship exhibit, titled "Secret City - The Oak Ridge Story", was completely redesigned and rebuilt in 2007. A World War II-vintage
flat top house, one of many inhabited by Manhattan Project workers in Oak Ridge, opened as a walk-through attraction in 2009, but was moved to the grounds of the
Children's Museum of Oak Ridge in 2018 and is now used by the
Manhattan Project National Historical Park as part of a display of the history of Oak Ridge. Several photos by
Ed Westcott are on display. The museum also provides bus tours of the local sites of the
Manhattan Project National Historical Park including the
X-10 Graphite Reactor National Historic Landmark, the
Y-12 National Security Complex and the East Tennessee Technology Park, located on the
site of the K-25 Building. The K-25 History Center, a 7,500-square foot museum operated by AMSE opened at the K-25 site in 2020. The museum is open seven days a week. The museum was free to the public for many years when its operation was fully funded by the
U.S. federal government, but now charges for admission. The museum is a
Smithsonian Affiliate. ==History==