Tennis anyone? The annual Arthur Ashe Kids' Day is back, bringing tennis stars and music superstars to NYC in advance of next weekend's US Open. Can't get to Queens? Check out the US Open Experience down in the Financial District for kids' clinics and big-screen tennis viewing.

For old-fashioned summer fun, soapbox contraptions roll through Park Slope at Saturday's South Slope Derby, or get soaked at Sprinkler Day at Asphalt Green. History buffs can celebrate the anniversary of the Battle of Brooklyn, fought in 1776 on land that is now part of Green-Wood Cemetery, at the Battle of Brooklyn Monuments Tour or the Battle of Brooklyn Commemoration on Sunday.

Also on Sunday, it's time to Boogie on the Boulevard up in the Bronx. The center lanes of the Grand Concourse from 162nd Street to 170th Street are closed to cars and open to a world of fun—with free music, art, and activities. This weekend is also your last chance to snag a free hot dog from the Hot Dog Bus.

Check a few more things off that "before school starts" summer bucket list—or start planning for fall: Tickets for Smithsonian Museum Day Live, offering FREE access to museums all around the city on September 22, are available to download now. Get 'em before they're gone! For more end-of-summer fun, check our August GoList and Event Calendar.