Info on touring the White House
For DC residents
Contact your representative for a Whit House Tour

Info on touring the Washington Monument (Tickets can be reserved up to six months in advance)

Indoor play-spaces:

Wegmans Wonderplace at the American History Museum (free)
ImagiNATIONS at the Museum of the American Indian (free)                              Child and young child room at The Building Museum
Magic Ground in Columbia Heights

Outdoor Playspaces:
Splash pad and wading pool at Yards Park                                                                    Park and Splash pad in Columbia Heights
Kalorama Park in Adams Morgan

More useful DC sites:

http://kidfriendlydc.com
https://washington.org/dc-cool-kids
http://www.dctots.com
http://freeindc.blogspot.com
http://gregslistdc.com
http://www.popville.com