We are taking a quick visit to D.C. for fall break. Our kids are 2, almost 4, and 8 year old boys and a 10 year old girl. We have a half day, 2 full days, and another half day in D.C. We are staying at the Greenbelt MD campground. We'll use the Metro to get around. DD10 wants to see the zoo, DS8 the monuments and memorials but especially the Lincoln, Washington, White House, and Capitol Building, DH votes for Natural History Museum. So, a half day at Natural History (any longer and DS's 2 and 4 will be bored, yes?), a zoo day, a Mall day, and then I get to choose another half day. Of course it all sounds good but considering our short, cheap, little-kids centered trip I'm looking at Air and Space, American History, and Bureau of Engraving and Printing as our best options. Any opinions which is best with 2, 4, 8, 10 yo's and why? TIA for your thoughts!
ETA: We know we won't be going in the White House this trip. Also not likely to go visit Senate/Congress galleries but we'll see. Again, not much planning time and 2/4 yo boys along!