Willard InterContinental Washington DC

Wonderplace for small kids and Spark Lab for young inventors. Check the play areas are open before you go.

Portraits and a courtyard, plus Explore, a hands-on space for 18 months to 8, so the youngest have their own room.

Dinosaur skeletons, animal halls, minerals and ocean displays under one roof, so each kid finds a room they want to stay in.

The founding documents themselves, with interactive displays that explain them. The line can run long, so go early.

Carved horses and an accessible chariot for riders who can't climb on, right between the museums.

Holocaust history told through one boy's life, made for kids eight and up. Plan to talk it through with them afterwards.