Fourth of July Weekend
Millions of tourists visit D.C. for the Fourth of July, and the city hosts a number of free family activities. There is a huge Independence Day parade down Constitution Avenue at noon, with floats and 100 marching bands. At the National Archives, there is a morning reading of the Declaration of Independence, as well as performances by military bands. There is free entertainment at the Sylvan Theater on the grounds of the Washington Monument all day long.
In the evening, the National Symphony holds an annual free concert on the west steps of the Capitol building at 8 P.M. Fireworks over the Washington Monument begin at sunset (around 9:20 P.M.)
Find more Fourth of July festivities at About.com Washington, DC.
On July 10, homemade and professional soapbox cars drive down Constitution Avenue, between New Jersey and Louisiana Avenues, from 10 A.M. to 6 P.M. Call 330-733-8723 for more information and entry rules.
Hosted by the French restaurant Les Halles (1201 Pennsylvania Avenue) on July 14, this celebration of French Independence Day features live entertainment, a waiter's race, a children's race, a customers' race, an obstacle course on Pennsylvania Avenue, a special menu, and affordable outside treats. It's from 11:30 A.M. to 4 P.M., but there's also an indoor party that runs all day until midnight. Call 202-347-6848 for more information. This is part of a 10-day Liberty Festival that begins on July 4.
In late July, Latino bands from all over the United States play music on Pennsylvania Avenue between 9th and 14th Streets. Food is available for purchase.
Water Lily Festival
This is held on the fourth Saturday of July at the Kenilworth Aquatic Gardens on the east bank of the Anacostia River. It's a beautiful 14-acre oasis of gardens and aquatic plants and animals. Free admission.
Legg Mason Tennis Classic
Tennis champions including Andre Agassi are present for this prestigious tournament at the William H. G. FitzGerald Center, 16th and Kennedy Sts. NW, held in the last week of July and the first week of August. For more information, visit the tournament's website.
Screen on the Green Film Festival
On Monday nights during July and August, you and your family can attend free showings of American movie classics on a 20 × 40 foot screen on the grounds of the National Mall. Past films include The Wizard of Oz and Rocky. Bring a blanket to sit on, and get there early to stake your claim on the lawn. Films start at sunset. Call 877-262-5866 for schedule, or visit them online.