Visit Smithsonian National Air & Space Museum Steven F. Udvar Hazy center.
If you are able bring your kids to the Air & Space Museum for Holloween. This is a very big event that is held every year for kids. The Museum has candy, games, crafts and other activities all day long. It is a good time to see all of the History here as will. I am posting two pic, the first one is the Museum in the day time from the North End. The second pic is the Museum at night with special lighting on the Museum. I am not sure if they are going to light the museum this year.