We absolutely love Washington D.C. Our DS8 LOVES the Smithsonian. He asks all the time when we are going back. The best part about it, all the museums are free. We got a really nice hotel with a HUGE continental breakfast for $71 per night. We took a tour ride on a double decker bus, which is a get on/get off type bus. It was $88 for all three of us for 2 days. It was great! We saw only 1/100th of what they have there in the 4 days we were there. Education, fun and memories, who could ask for more!
Our second trip back, we booked the same hotel, and the manager personally wrote us a letter thanking us for coming back to his hotel, and there was bottle waters, and a jar of Jelly Beans in our room welcoming us back. It was a really nice touch!