Wake up. September’s coming to an end.

PONDER
World Maker Faire
What: Secure your thinking cap. Inventors and DIYers gather at the New York Hall of Science to display their mad creations (a life-size mousetrap, 3-D printers) and share skills (we’re talking lock picking, not quilting).
Why: Kick it old school in mini cars at the Nerdy Derby and (everyone’s favorite) the Diet Coke and Mentos demo.
When: Sat., 10 a.m.-7 p.m.; Sun., 10 a.m.-6 p.m.
Where: 47-01 111th St., Flushing Meadows. Tickets ($27.50-$50) at makerfairenyc.eventbrite.com or the door ($30).

BON APPETIT
Le Taste of France
What: Treat yourself to Gallic bites from top chefs, swirl and sniff varietals from Burgundy to Bordeaux, join a game of petanque, shop the stalls of a French-style market, and gawk at primped French bulldogs.
Why: Spend Saturday night at La Soiree for all the food and wine a true Francophile can handle.
When: Le Taste, Sat., 11 a.m.-5 p.m.; Sun., 11 a.m.-6 p.m. La Soiree, Sat., 6:30-11 p.m.
Where: Pier 54, W. 14th St., at Eleventh Ave. Tickets ($30-$149) at letasteoffrance.eventbrite.com.

MELT
Smush Opens
What: A deli-style ice cream-sandwich shop where cookies look like bread, fudge is sliced thin, and toppings are layered thick. Design your own or go for a Sloppy Mo or French Chip.
Why: Once the weather cools, warm cookies (red velvet, peanut butter cup, candy) stuffed with spreads (Nutella, marshmallow) and fruit (strawberries, bananas) keep your sweet tooth toasty.
When: Daily, noon-9 p.m.
Where: 28 W. 40th St., b/t Fifth & Sixth Aves. (212-221-3410).

SHOP
Erica Weiner Sample Sale
What: The Brooklyn-born designer marks her delicate jewels 20 percent off and knocks 10 percent off antique baubles.
Why: Find a conversation starter amid the one-off samples, limited editions, and discontinued pieces.
When: Fri., 4-8 p.m.; Sat. & Sun., noon-8 p.m.
Where: 173 Elizabeth St., b/t Spring & Kenmare Sts. (212-334-6383).

MINGLE
In-Shop Soiree
What: The Brooklyn shop celebrates its second coming with heavy-handed discounts (on vintage furniture, jewelry, art, and decor), cocktails, and blaring tunes.
Why: On your way in, take a peek at the spanking-new mural by Ellie Balk.
When: Fri., 7:30-11 p.m.
Where: RePop, 143 Roebling St., at Metropolitan Ave., Williamsburg (718-260-8032).

WATCH
Russian Documentary Film Festival
What: Following victories on the European film festival circuit, nineteen features you’re unlikely to see anywhere else grace the screens of Tribeca Cinemas.
Why: No need to be fluent in another tongue — all features are subtitled or dubbed.
When: Fri.-Sun.
Where: 54 Varick St., at Laight St. Tickets and schedule at tribecacinemas.com.

Photo: Courtesy of World Maker Faire