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, big-screen tennis viewing, and the chance to score a free racket!

For old-fashioned summer fun, soapboxes will roll through Park Slope at Saturday's South Slope Derby, or families can create art En Plein Air on the High Line. 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 Commemoration on Sunday. Or visit George Washington's Encampment on the Upper West Side to check out what revolutionary soldiers had to eat.

Jazz fans (and fans-in-the-making) can "count down to the 20s" at Governors Island's Jazz Age Lawn party, where jitter-bugging is on repeat all weekend long and kids under 12 can tag along for free. Or hit the Jazzmobile Block Party in Corona, Queens, at the Louis Armstrong House for serious be-bop cred.

Check a few more things off that "before school starts" summer bucket list—or start planning for fall: Tickets for Smithsonian Museum Day, offering FREE access to museums all around the city on September 21, are available to download now. Get 'em before they're gone! For more end-of-summer fun, check our August GoList and Event Calendar.