Start your winter farmers market shopping. A winter farmers markets starts Saturday in Cambridge (10 a.m. to 2 p.m. at the Cambridge Community Center, 5 Callender St., near Central Square), joining the one in Somerville that’s been running since Dec. 1 (9 a.m. to 2 p.m. at Arts at the Armory, 191 Highland Ave.). This is the second season for Cambridge’s market, which includes live music and performance – this week it’s Dru, The Ruckus and Jenny the Juggler – as well as sales of local art (from 1 to 3 p.m.) and food every Saturday through April 27.

The Cambridge market boasts more than two dozen New England vendors selling fruit, vegetables, meat, fish, cheese, eggs, yogurt, maple syrup, honey, pickles, pastas and sauces, wines, preserves, breads and other baked goods. New this year are wines from the Truro Vineyards, of Cape Cod, and Green River Ambrosia, of Greenfield; rice and turbinado beet sugar from Boundbrook Farm, of Vergennes, Vt.; flours and sunflower oil from Misty Brook Farm, of Hardwick; pickles from Ruuska Pickles, of Plymouth; yogurt and cheese from Sidehill Farm and Robinson Farm; and lunches from The Biscuit, Somerville’s Culinary Cruisers and The Soup Guy, of Dover, N.H.

This Saturday the Cambridge Energy Alliance brings an interactive map showing the solar power potential of any Cambridge address. Shoppers who schedule an energy assessment will get a $3 coupon to spend at the market, courtesy of Next Step Living; the market also matches the first $10 spent by Snap/EBT customers with an additional $10 to spend at the market, courtesy of the Boston Foundation.

Turn yourself or your kid into an action movie star. If you or someone you know wants to be a Wesley, Bay State Fencers has an open house from 9 a.m. to noon at 561 Windsor St., Somerville, not far from Inman Square, with refreshments as well as derring-do and a tour of the facilities; if you have health insurance that covers your kid’s inevitable gashes, sprains and the occasional compound fracture, you definitely want to check out the parkour lessons at Central Hill Park (81 Highland Ave., Somerville) at 11 a.m. Sunday for kids starting at age 6 and at 1 p.m. Sunday for kids 16 and over.

Don’t know what parkour is? Maybe what you don’t know won’t hurt you — it didn’t seem to hurt James Bond at the beginning of “Casino Royale” — but your kids will probably know; this “freerunning” technique of sprinting gymnastically through urban environments is described as one of the world’s fastest-growing sports. And it may be best left to people with lots of stem cells pumping through their bodies.

The classes are run by Parkour Generations, which has been teaching kids since 2006.

Take in some art – well, a hell of a lot of art – free. Lesley University’s Art Institute of Boston holds its large-scale “Objectified” exhibition through Jan. 12 to showcase the work of more than 100 alumni of its Master of Fine Arts program. It’s one of the largest exhibitions in New England this year and is described as celebrating the diversity and strength of the program (which is soon moving to Porter Square). The show is open daily from 9 a.m. to 5 p.m. at Washburn Hall on Lesley’s Brattle Campus, 10 Phillips Place, near Harvard Square. The entire exhibition book is online here.

Get your fill of singer-songwriters. The year’s Somerville Songwriter Sessions begin this weekend at the Armory Café with short solo performances by five of the genre’s best local practitioners (four from the area, one from Providence, R.I.) and a climactic round-robin song swap. The performers – and producers of the series, which runs the first Saturday of each month – are Laura Bullock, Beth DeSombre, Terry Kitchen, Jan Luby and Bethel Steele. The concert is at 8 p.m. Saturday at Arts at the Armory, 191 Highland Ave. Admission is $10. Food is available.

Fulfill your Cambridge destiny with a fiction and poetry reading. Cambridge doesn’t lead in literary events anymore, but Lesley University is fighting back with its 2013 Winter Reading Series through Wednesday. Hear from eminent novelist (and esteemed Cantabrigian) Anne Bernays and poet Steven Cramer at 6:30 p.m. Saturday; Hester Kaplan brings her new novel “The Tell” and Kevin Prufer his poems at 6:30 p.m. Sunday. The readings are free and take place at Lesley’s Doble Campus in the Marran Theater, 36 Mellen St., between Massachusetts Avenue and Oxford Street (which is between Harvard and Porter squares).

See the rest of the series schedule here.