“Try It Truck” with the Bay Area Discovery Museum: Youth ages 5-10 can get a taste of the engineering design process by trying out new ideas, building creative problem-solving skills and exploring a mobile engineering lab, Richmond Branch Library, 351 Ninth Ave., Saturday, Aug. 4, 2-3:30 p.m., free. For more information, call (415) 355-5600.

Learn Tai Chi: Tai Chi may help improve health, fitness, balance, flexibility, coordination and posture, this class introduces the Yang style long form and is taught by instructor Irene Lee, Anza Branch Library, 550 37th Ave., Monday, Aug. 6, 4-5 p.m., free. For more information, call (415) 355-5717.

SFPD Taraval Station’s National Night Out: Come out for a night of fun! Meet your neighbors and local law enforcement professionals at this annual community-building campaign to help strengthen the relationship between the police and the communities they serve, enjoy arts & crafts, games, food and more. Playland Community Park, 1360 43rd Ave., Tuesday, August 7, 5-8 p.m., free. For more information, call (415) 553-0123.

Foraging Journal for Teens: Put summer memories into a DIY “junk” journal made from recycled materials, there is no right or wrong way, for ages 10-18, signup required, Anza Branch Library, 550 37th Ave., Tuesday, Aug. 7, 4:30-5:30 p.m., free. For more information, call (415) 355-5717.

Rare and Vintage Rock Film Clips: Rock historian and author Richie Unterberger’s presentation commemorates the 50th anniversary of 1968 in both music and society, with clips from the Beatles, Rolling Stones, James Brown, The Supremes, Pete Seeger, Janis Joplin, Jefferson Airplane and numerous other artists, Park Branch Library, 1833 Page St., Wednesday, Aug. 8, 6:30-8:30 p.m., free. For more information, call (415) 355-5656.

Five Fabulous Women Artists of the 1800s: Local artist and art historian Marlene Aron presents slides of the beautiful and inspiring art of five women: Mary Cassatt, Berthe Morisot, Marie Bracquemond, Eva Gonzales and Camille Claudel, women who were among the movers and shakers of the Impressionist Movement, Richmond Branch Library, 351 Ninth Ave., Wednesday, Aug. 8, 6:30-8 p.m., free. For more information, call (415) 355-5600.

Trail Mixer: The Golden Gate National Parks Conservancy hosts a “trail mixer” that is all about playing in the parks and de-stressing after work with an “adult recess,” Sutro Heights Park, 846 Point Lobos Ave., Thursday, Aug. 9, 6-8:30 p.m., $17-$20 (ages 21 and older, I.D. required). For more information, call Ame Cruz at (415) 561-3000 or go to the website at http://www.parksconservancy.org.

Teen DIY Jewelry Projects: Participants can pick a project using the featured book, “Fashion Jewelry: A Beginner’s Guide to Jewelry Making,” and make a creation to keep, supplies provided, ages 13-18, no sign-ups necessary, Richmond Branch Library, 351 Ninth Ave., Teen Room, Thursday, Aug. 8, 4:30–5:30 p.m., free. For more information, call (415) 355-5600.

Kid-Friendly Cooking: A kid-friendly cooking activity followed by a sampling of what was just concocted, all materials provided, Sunset Branch Library, 1305 18th Ave., Thursday, Aug. 9, 2-2:45 p.m., free. For more information or to make reservations, call (415) 355-2818.

SF Women Artists’ Reception/Opening: The exhibition “What Brings Us Joy” runs from Aug. 7 to Sept. 8, opening reception at the SFWA Gallery, 647 Irving St., on Thursday, Aug. 9, 5:30-8 p.m., free. For more information, call (415) 566-8550 or visit the website at www.sfwomenartists.org.

Plant Swap: The public is invited to bring succulents, cuttings, seeds or surplus harvest to the library’s back patio to trade with other local gardeners – share surplus and take home something new, Ortega Branch Library, 3223 Ortega St., Saturday, Aug. 11, 11 a.m.-noon, free. For more information, call (415) 355-5700.

Cannabis and Aging: CBD oil, a specific cannabinol from the cannabis plant, has hundreds of health and anti-aging benefits, Dr. Laurie Vollen will discuss its benefits and uses specifically for the aging mind and body, Park Branch Library, 1833 Page St., Wednesday, Aug. 15, 6-7 p.m., free. For more information, call (415) 355-5656.

Flower Show: The Dahlia Society of California will hold its annual show and exhibition, Golden Gate Park, County Fair Building, Ninth Avenue and Lincoln Way, Saturday and Sunday, Aug. 18 and 19, 10 a.m.-4 p.m., free admission.

Hepatitis B Educational Presentation: A discussion about Hepatitis B and the importance of getting a blood pressure check-up with nursing professionals from San Francisco Hep B Free and SF State School of Nursing, presented in English and Cantonese, Parkside Branch Library, 1200 Taraval St., Saturday, Aug. 18, 2-2:30 p.m., free. For more information, call (415) 355-5770.

Learn about Flight:  Youth ages five and up are invited to explore the science of flight by creating paper airplanes and gliders, all materials provided, Presidio Branch Library, 3150 Sacramento St., Saturday, Aug. 18, 2-3 p.m., free. For more information, call (415) 355-2880.

Cooking Classes: Shanta Nimbark Sacharoff, author of three cookbooks, including “Cooking Together,” is offering three cooking classes at her home, each with hands-on instructions and a complete dinner, 2138 48th Ave., Aug. 18 and Aug. 25, 2:30-5:30 p.m. For more information or to register, call (415) 682-9104 or email shanta@otheravenues.coop.

Yoga Meditation: This class offers simple but powerful yoga (mostly breathing and stretching) and meditation practices to bring stability and balance, taught by the Isha Foundation, an international nonprofit organization founded by Sadhguru, a yogi and visionary, mat recommended but not required, no registration necessary, Anza Branch Library, 550 37th Ave., Tuesday, Aug. 21, 6-7 p.m., free. For more information, call (415) 355-5717.

Cheese and Wine Tasting: Join cheesemonger Gordon Edgar of Rainbow Grocery Co-op as he talks about cheese and how to pair it with wine, adults over 21 only, space is limited, sign-ups begin on August 1. Sunset Branch Library, 1305 18th Ave., Wednesday, Aug. 22, 7-8 p.m., free. For more information and to sign up, call (415) 355-2808.

Get in My Belly!: Students can get ready for back-to-school by learning to make an apple crisp dessert with apples, a microwave oven and some ice cream to top it all off, Get in My Belly! is a teen series featuring quick and easy recipes to make at home or in a dorm room, for ages 13-18, Richmond Branch Library, 351 Ninth Ave., Tuesday, Aug. 28, 4-5 p.m., free. For more information, call (415) 355-5600.

Make a Little Notebook: Create a notebook with cardstock, waxed thread and paper to use as a journal or to give away as a gift, all supplies provided, Presidio Branch Library, 3150 Sacramento St., Wednesday, Aug. 29, 6:30-8 p.m., free. For more information, call (415) 355-2880.