At which Smithsonian do you do your volunteer work? I'm ashamed to admit that we don't go to them as often as we should. I mean, we're only about 20 miles from DC, so we should go at least a few times a year. We did do Zoo lights in November, and signed up for Fonz again, but it's been more than a year since we've been to any of the museums.
"Normally" it's the Museum of American History... but as it's been closed for the last year and approaching a half (lots and lots of major renovation work as well as some desired remodeling at the same time), I've been over at Air & Space with the National Treasures of American History exhibit since it's been open. I highly recommend that exhibit if you get a chance.... and it will be closing mid-April, to start putting things in order for the re-opening of the museum this summer (no date yet, just "Summer 2008" is the best we've been told too).