Lots of good ideas so far.

Maybe try Visionary Art Museum in Baltimore.
It's a vey unique place.

Earthtreks in Rockville.

Is there a ropes course in VA?

Trampoline park in Springfield VA too.

Go to iPic or ArcLight in Bethesda. Go horseback riding in Middleburg. Take a cooking class @ Le Acad de Cuisine. Go to an Xmas tree farm. Pinstripes in Georgetown. Trampoline park and raceway in Columbia if you're willing to make the drive...

Anonymous wrote:National museum of medicine at Walter Reed in Silver Spring. Lots of gnarly stuff there that a teenage boy, at least, would like.

Is this still at the Walter Reed site or did it move along with everything else?

National museum of medicine at Walter Reed in Silver Spring. Lots of gnarly stuff there that a teenage boy, at least, would like.

Anonymous wrote: Go to a ropes course? There is adventure park in Sandy Spring Maryland as well as it go ape in Germantown or Gaithersburg

This was my first thought too!! Sandy Spring Adventure Park is fabulous!!

http://roomescapeadventures.com/washington-d-c/

This looks intriguing.

Smithsonian Native American Indian? bonus that there is a cafe with cool foods. speaking of cool foods, you could take them out for ethiopian food in adams morgan. the US Mint?

Monuments at night.

How about the National Geographic museum? I take the kids to all of they're exhibits, which are usually really good. It's on Global Food now, and you can get a coupon on the bottom of a Whole Foods receipt.

Go to a ropes course? There is adventure park in Sandy Spring Maryland as well as it go ape in Germantown or Gaithersburg

Zoo lights?
Udvar Hazy?

Why not just go to a movie- so many good ones coming out.

My 14 and 13 year old nephew and niece are visiting from NYC the day after Thanksgiving. They've been here many times so we've done the usual suspects.