I would highly recommend Harrison's place! It is on the same block as The Roost, a food hall-style place where everyone in the family can get their favorites in one spot, and it's just across the street from a metro station (bonus that it's the same metro line that takes you to the National Mall/ Museums). We've stayed in this neighborhood before and it's becoming our favorite place to stay while in DC. There's a nice playground for the kids about a 10-minute walk (or one metro station stop) away and the Anacostia River and the bike path are also just a short distance away. We will definitely stay here again the next time we are in town.