Kids love to visit the Air and Space museum and the Museum of Natural History – the dinosaur museum, if you must know.
The parks, like the one down by the Washington monument, are really beautiful in springtime.
DC has a really diverse array of restaurans. They have a nice mix of the franchise ones and the one-of-a-kind establishments. Even the franchise eateries are kind of unique.
Over in Georgetown, on M Street and also Wisconsin Avenue – you will be amazed at how many restaurants you can find: German, lots of French, some Thai and Indian, lots of Pizza/Italian places, some Tex-Mex. All kinds, really.
DC in August is very hot and humid, though. So, if you are not acclimated to hot weather – do yourself a favor and do not go at the peak of summer if you are going to walking a lot outdoors.
DC area traffic really gets snarled when it snows. Springtime in DC is the best.