*With the beautiful change of season and the newly falling leaves, you may want to plan a day of hiking, biking, and enjoying the great outdoors with your kids. Here are 15+ ideas for local fall foliage fun, plus some arts & crafts projects for all of the colorful leaves you gather.

*Last chance to help your school win a Blackboard Award! If you love your child's school or principal, please submit a nomination: blackboardawards.com. Deadline to nominate is Monday, October 15. 

Still need a Halloween costume? GrowNYC and Ottendorfer Library's swap is a great--and free--way to find new-to-you costumes. Scramble no more! (Friday)

Urban, an edgy Colombian acrobat troupe coming to New Victory Theater this weekend, is just for kids who think they've seen it all. Hang on tight! (Friday-Sunday)

Take over Madison Square Park at its Fall Kids Fest, which brims with crafts, pumpkin patch fun, and other carnival fare. Here's what else to expect. (Saturday)

Applause is lighting up the night with a Hip Hop Night for tweens and teens this year, with tunes from DJ Fulano, a graffiti artist, and more. Oh my! (Saturday)

Sweaty Saturday encourages kids to get active and get healthy all over the city. From Gaga to yoga, see the participants here. (Saturday)

Laugh out loud at "Exit, Stage Left!", the silent slapstick comedy at Symphony Space. Expect rubber chickens, balancing ladders, and more. What a hoot! (Saturday)

The My Dog Loves Central Park Country Fair celebrates your canine best friend with games, obedience contests, trainer tips, and more. Awww. (Saturday)

Love creative theater adaptations? Check out "Guyi-Guyi," an "Ugly Duckling" rendition involving crocodile friends and identity crises. Get the clever scoop here. (Saturday-Sunday)

It's a pirate adventure at Ascarium, the New York Aquarium's annual Halloween attraction. Say "ahoy" to sunken ships, dancing gypsies--and a chance to get in free. (Saturday-Sunday)

Harmony on the Hudson, a summertime Battery Park City favorite, is grabbing onto the last of fair weather with a Family Day of arts, games, and performances. Enjoy! (Sunday)

Get more music at 92YTribeca's B.Y.O.K. concert series, presenting Astrograss for Kids this weekend--with a side of healthy snacks and a discount program. Rock on! (Sunday)

92Y is hosting a "Helping Language Grow" presentation and Q&A, all about the best ways to help your toddlers pick up basic language skills. If you have burning questions about bilingualism, delayed speech, or other hot topics, here's the place to get answers. (Tuesday, October 16)

Open houses and trial classes are still going on in the city, including Gymboree's new UWS location and the year-old The Day School. We've updated out list of where little ones can test out all the offerings, so take advantage!