Things to Do This Weekend: Harlem Fest, Sand Castles, Kites, Math Fest, Honey

 Kick off your flip-flops and enjoy free outdoor play in the high-powered sprinklers at Asphalt Green's Sprinkler Day. Photo courtesy of Asphalt Green
Things to Do With NYC Kids August 17-18

We're counting on having a great time at the fourth annual Math Festival hosted by MoMath on Saturday, with laser cutting, giant mazes, music, and roller coaster design to make STEM irresistible.

Also this Saturday: Watch the colors fly at the Upper West Side's annual Kite Flying Festival. Scoot down to the third (and final) Summer Streets Fest. Skip through the sprinklers at Asphalt Green's second splashy free-for-all. Or head down to Coney Island to enjoy the sunshine and artistry at the annual Sand Sculpting Contest.

Harlem Week romps through uptown all weekend long, with a children's festival on Saturday and daily performances that run from hip hop to poetry to tap dance. And Wave Hill is literally buzzing—it's Honey Weekend again, and that means candle-making, sweet treats, and the traditional Be a Bee workshop and parade.

All this, plus over a hundred other events (50+ each day) are baked into the Mommy Poppins Calendar. Check out our list of the 50 best places to cool off this summer, and don't forget the fun-packed August Go List. And the outdoor movies that were canceled due to all the rain earlier this summer are now being scheduled through September—bookmark our Free Outdoor Movie page to see what's playing (for free!) near you.