Anonymous wrote: I might plan something short and sweet for the first trip. If you’ve got a runner who likes spaceships, then air and space is the best bet. I’ve never met a kid who didn’t like the natural history Museum, which, come on!, has animals and dinosaurs. Automatic win! The Native American museum has a fun place space for kids but I don’t know if he’s too young for most of what they have. So in your shoes I’d leave the baby at home, take the 3yo to natural history, plan to spend an hour looking at stuff and then eat in the cafeteria; look at stuff for another 30 minutes then leave. Run around on the Mall on the way back to the metro.
FYI, I think what this PP may have meant is to bring your own food (which is allowed) and eat in the cafeteria. Unless you're willing to shell out for waaaaay overpriced wraps and salad, even by DC standard.