National Archives Museum

Galleries inside and a sculpture garden outside, so when kids are done with paintings there is room to walk among the big pieces.

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

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

Landmark planes and spacecraft overhead, and a gallery on how flight works with a plane kids can sit in. Book the timed passes first.

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

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