Dinos Alive! "Flying Monsters," AMNH's new National Geographic IMAX film, animates powerful pterosaurs bone by bone and explores just how these rulers of prehistoric skies once took flight. (Friday-Sunday)

 

Everyone's favorite I-Spy character is coming to life in Story Nook's month-long Where's Waldo hunt. Use your eagle eyes to spot Waldo at 16 of the participating stores to claim prizes like book sets, music classes, and more. (Friday-Sunday)

 

Only in New York can you conduct experiments, help build a boat, hang out with animals, and make your own instruments at a single place along the Hudson. Yep, it's time for Science on the River again! (Saturday)

 

For more waterside festivities, hop aboard a Circle Line Kids' Cruise to meet Berenstain Bears characters, jam along to the tunes of Danana Banana, and delight in the talents of a juggler, magician, and balloon artist. (Saturday)

 

Mini scientists won't feel so little compared to the nanotechnology spotlighted at the Sony Wonder Technology Lab. Hands-on activities will help you learn how the small particles can make a big difference in science. (Saturday) 

 

What's better than a giant LEGO structure? An entire safari of giant LEGO structures, of course. Walk through LEGO tigers, flamingos, and more at the Bronx Zoo, then build your own animal and catch a hilarious musical puppet show. (Saturday-Sunday)

  

If you didn't have a proper BBQ on the 4th, Governors Island's Cook Out NYC is offering over 20 grilling stations to satisfy--plus a custom beer tent for the grown-ups. (Saturday-Sunday)

 

Get ready for some wacky fun at SummerStage Kids' Family Day in Central Park, where Justin Roberts and The Not Ready for Naptime Players are making a special appearance alongside the dance, crafts, and storytelling galore. (Sunday)

 

It's all about flash and color at the Queens Museum of Art's new Caribbean exhibit. Bonus: MetLife Second Sundays means free admission for opening weekend, plus a host of mask- and instrument-making workshops. (Sunday)

 

Celebrate the 50th anniversary of The Snowy Day by rocking out at this year's Ezra Jack Keats Family Concert, featuring legendary a cappella ensemble Sweet Honey in the Rock.  (Sunday)

 

We spy a mysterious adventure during The Museum at Elridge Street's Preservation Detectives program this weekend. Grab your binoculars, magnifying glasses, and other sleuthing tools to crack the secrets within the museum's 125-year-old walls. (Sunday)

 

Family fun doesn't end with the weekend: "Tico Tales" arrives at Literally Alive with a free bilingual adaptation of Costa Rica's traditional folk tales. Tickets are released at the door, so be sure to show up early! (Tuesday)