Before we made it to the Smithsonian's National Air and Space Museum, they had this little observatory station outside. They had a special event that day where they were focusing on the Sun. I'm a little dubious they don't do this everyday because what else you're going to see during daylight besides the source of such daylight?
They had this thing set up so you could see the Sun in detail with your own eyes, and not suffer from blindness either. It's been awhile since our DC trip (it's taken me this long to detail it) but I want to say the filter on it was green in color.