Back to school is upon us and with it comes the dizzying to-do list—school supplies, new clothes, pressed uniforms, meeting new teachers, coordinating carpools and more. If, through this hustle and bustle, you've managed to also get extracurricular activities in order and your kids signed up, you're a step ahead of many of us that haven't yet signed our kids up for classes. With so many wonderful class options throughout Westchester, how do you decide?

You can start by attending an open house at one of the many class offerings in and around Westchester. Some host only one open house while others offer multiple dates. There are many coming up and we've gathered up the details for you. Take a look; you just might find your kids' next great passion. For more options, peruse our Class Directory. We'll continue to update our listings so check back often. Better yet, sign up for our FREE newsletter to stay up to date on everything Westchester has to offer families and kids.

So we're back in school. We're packing lunches, going to PTA meetings. and overseeing homework. And we're probably starting to wrap our minds around figuring out some enrichment classes to fill in the gaps and/or add some sparkle to the process. Your child might attend a school with a great onsite, low-cost after-school program, which takes care of half the question already; on the other hand you might be trying to figure out the shortest distance between your house and a place to constructively use those ballet shoes. Open houses and free trial classes make the hunt for great classes a little more do-able, which is why we offer this list of 10 great places that offer chances to try it out for free, either in the coming weeks or - in many cases - all year long.

Facebook has been a seemingly endless stream of adorable back-to-school pics this week. We even posted some first day pics from our Mommy Poppins bloggers and are encouraging readers to share their photos in the comments. (We can't get enough of those spiffy outfits and backpacks.) In addition to getting back to the books, we've been prepping for fall, updating our apple picking posts and our roundup of September fairs and festivals, and compiling lists of FREE trial classes for enriching kids' programs in NYC, New Jersey and beyond.

All of our regional sites also published brand-new September Go Lists highlighting the best things to do with kids throughout the month in Westchester, New Jersey, on Long Island and even further afield. With the Rosh Hashanah holiday weekend coming up (public schools are closed Thursday, September 25 and Friday, September 26, in case you didn't know), you may have time for a Go List-inspired day trip or a weekend getaway. Our Travel site just did a lovely post about Lake George in the Adirondacks, which is a wonderful destination for fall foliage.

And we have a great giveaway going on: Enter to win four tickets to see the long-running smash Blue Man Group. It's one of our top five Off-Broadway shows for families.

Here's what else we covered on the NYC site this week:

It may be back to the grind at work and school, but for recreation in Westchester, the party is still on this weekend, including three events we highlighted on our September Go List. Celebrate the Hudson River at the Yonkers Riverfest, the Annual Take Me to the River Festival or the Croton Yacht Club Hudson River Day. For a jazz theme, take in theWhite Plains Jazz & Food Festivalor theJazz Ensemble Performance by the NAACP Youth Organization.

Also this weekend, the NY Metro Reptile Show returns to White Plains, the Leukemia Cup Regatta is raising money for cancer research and Greenburgh Nature Center hosts its annual Harvest Party. And, of course, you can still check out the New York Renaissance Faire.

For those of you who don't know, this Sunday is Grandparents Day and Legoland Discovery Center is celebrating with FREE admission for grandparents all weekend. Visit our event calendar for more ways to celebrate Grandparents Day, plus lots of other fun events happening around town.

Read on for the best events happening this weekend in Westchester. If you see something interesting, click through to the event listings for full details.

While the kiddies all went back to school this week and the calendar turned to September, summer weather is still lingering. Take advantage of the warm temps and sunny days by heading outdoors this weekend.

Fall fairs start this weekend, such as the East Northport Festival and the Fiddle & Folk Festival in East Setauket, as do several other weekly activities, such as the Explorer Family Backpacks at Hofstra University, The Butterfly House in Smithtown and the Seatuck Family Nature Club in Islip.

Don't see your event listed here? Add it to our events calendar. And if you don't receive this post in your inbox, subscribe to our newsletter. And be sure to check out our Long Island Classes Guide for some after-school programs that might interest your child.

Despite the sweltering weather, fall is nearly upon us now (I've even seen some red leaves!). The Marini Farm Corn Maze opens this weekend with a special Doggy Maze Daze fundraiser for the Ipswich Humane Society.  This weekend both the Museum of Fine Arts and the Fruitlands Museum have free days, and history comes to the fore in the Boston Charter Day and Worcester Revolution celebrations.

But really, this is the weekend of Open Houses. The back-to-school season means so much more than just the regular school day, and the Boston area is full of exciting enrichment opportunities for kids (For the full scoop, check out these  Open Houses and Free Trial classes for Kids). Kids can audition for the New School of Music Choir or Chamber Orchestra. If you aren't sure your kid is ready to audition, you can explore options at musical open houses at the New School of Music, Concord Conservatory of Music, and Brookline Music School. The Tony Williams Dance Center has an open house this weekend, and so does the Danforth Museum of Art. New and expectant parents can check out the the JCC Early Parenting programs. Parents of active little kids  can check out the free events at My Gym Boston, Newton, and Medfield, or Ready, Set, Kids! in Arlington. Curious about 3D Printing? Register for 3D Printerfest at Einstein's Workshop, where you'll see the amazing technology in action and find out about all the cool things you can make with a 3D printer. 

Also on Mommy Poppins this Week:

• Do you know a kid who is doing great work in the community? Nominate them for our Boston Kids Who Really Rock Contest, and we will sing their praises. Plus, one grand prize winner will win cash for local nonprofits!
• Anna shares some tips for preparing your kid to Travel Alone in the City.
• Amelia teaches us how to make healthy Protein Boosted Rice Crispies Treats.
• Tara finds 21 Ways to Extend the Summer in Boston for some post-Labor Day fun.

Check out all the great things on our calendar this weekend, and try to stay cool!

So we're back in school. We're packing lunches, going to PTA meetings. and overseeing homework. And we're probably starting to wrap our minds around figuring out some enrichment classes to fill in the gaps and/or add some sparkle to the process. Open houses and free trial classes make the hunt for great classes a little more do-able, which is why we offer this list of 10 great places that offer chances to try it out for free, either in the coming weeks or - in many cases - all year long. And for more enrichment options, check out our Enrichment Programs, Classes and Activities Guide.

I admit it, I complained a lot about the end of summer; but I'm starting to get onboard with this whole school thing. Think about it: someone else is taking it upon themselves to make your kid smarter. And as if that weren't enough, there are even afterschool programs to make your kids even more accomplished, and many of them are cheap or even free! (Have I mentioned how much I love free?) Why, with your smart and now skillful children, you'll have no choice but to set them free into the world. (Just be sure to pack them a healthy snack).

But that's just Monday to Friday, the 9-to-3 grind. On the weekend they're all yours. Whatever will you do with them? (Are you sensing the ace up my sleeve?) Why yes, we might have a thing or two to amuse them. Like, I don't know, large as life dinosaurs!  Really big ships! Nom nom lobster and fried-anything-you-can-conceivably-fry. Free family fests at the Hammer, the Bowers, and CAAM. Chalk and bugs and howling at the moon....

It's a good thing there's school on Monday, because you're going to need a break after this weekend.

Keep reading to get schooled on our favorite picks for this weekend....