“Wings of Fancy” butterfly exhibit, Asian, Costa Rican and North American caterpillars and butterflies, live and in many colors. 10 a.m.-4 p.m., daily through Sept. 16. Brookside Gardens, 1500 Glenallan Ave., Wheaton. $6; ages 3 to 12, $4. 301-962-1400.
Child safety-seat inspection, a check on the condition and proper installation of seats and boosters required for age 7 and younger (unless they weigh more than 65 pounds or are at least 4 feet 9 inches tall). Sponsored by the Montgomery County Police Department. 10 a.m.-12:30 p.m., Fitzgerald Auto Mall, 5501 Nicholson Lane, Rockville. Free. 240-773-5030.
Morning children’s program, a performance by musician Steve Rossi, a.k.a. “Mr. Knick Knack.” Take a blanket or lawn chairs. 10:30 a.m., Gaithersburg City Hall, 31 S. Summit Ave., Gaithersburg. Free. 301-258-
6350 or www.gaithersburgmd.gov/onstage.
Seniors Organized for Change “Lunch and Learn,” with a presentation by Sidney A. Katz, mayor of Gaithersburg. 10:45 a.m., Ring House, 1801 E. Jefferson St., Rockville. Lecture, free. Lunch, $5; reservations required. 301-348-3760.
Mad Science of Washington: “Spectacular Science!” for ages 5 to 11 accompanied by an adult, an interactive introduction to basic science, with bubbling potions and other cool chemical reactions. 2 p.m., Wheaton Library, 11701 Georgia Ave. Free. 240-777-0678.
Fulks Corner farmers market, seasonal fruits and vegetables from local farms. 2-6 p.m. Thursdays. Fulks Corner Avenue at Route 355, Gaithersburg. 301-590-2830.
Soulful jazz standards concert, part of the Main Street Music Festival, a performance by Janine Gilbert-Carter. 6-9 p.m., 325 Main St., Gaithersburg. Free. 301-355-8079.
Outdoor movie: “Kung Fu Panda 2,” a screening of the 2011 computer-animated adventure film. Take a blanket or lawn chair; film begins at dusk. Robertson Park, 801 Rabbitt Rd., Gaithersburg. Free. 301-258-6300.
Friday, June 22
“Basics and Beyond” computer tutoring, 2 p.m., Rockville Memorial Library, 21 Maryland Ave. Free. 240-777-0140.
Soulful jazz and blues, part of the Downtown Wheaton TGIF Summer Concert Series, a performance by Mary Ann Redmond. 6:30-8 p.m., Wheaton Triangle, Grandview Avenue and Reedie Drive. Free. 240-777-
8106 or www.wheatonmd.org.
Chamber music society practice and performances, musicians of all skill levels are invited to participate in ensembles. Sponsored by the Montgomery County Chamber Music Society. 7:15-8:30 p.m., Fridays, Living Faith Lutheran Church, 1605 Veirs Mill Rd., Rockville. 301-770-0041 or www.mccms.org.
Zydeco and Cajun dance, featuring the all-girl C’est Bon Cajun Dance Band. Beginners lesson, 8:30 p.m., followed by dancing until midnight. Glen Echo Park, Bumper Car Pavilion, 7300 MacArthur Blvd. $15. 301-634-2222.
Saturday, June 23
Montgomery “Heritage Days,” a Saturday and Sunday celebration of the history, culture and beauty of Montgomery County. Music, games, crafts, refreshments, and history tours at more than 30 locations. Sponsored by the Heritage Tourism Alliance of Montgomery County. Go to www.heritagemontgomery.org for schedule and locations. 301-634-2222.