Bethesda Art Walk

A monthly guided tour of galleries in Bethesda, from 6 to 9 p.m. tomorrow. Included are Creative Partners Gallery, 4600 East West Hwy.; Discovery Galleries Ltd., 4840 Bethesda Ave.; Frame Avenue, 4919 Cordell Ave.; Fraser Gallery, 7700 Wisconsin Ave.; Gallerie Elan, 7247 Woodmont Ave.; Gallery Neptune, 4808 Auburn Ave.; Moriah Gallery, 7301 Woodmont Ave.; Orchard Gallery, Art and Framing, 7917 Norfolk Ave.; Osuna Gallery, 7200 Wisconsin Ave.; Ozmosis Gallery, 7908 Woodmont Ave.; St. Elmo's Fire Gallery, 4928 St. Elmo Ave.; and the Washington School of Photography, 4850 Rugby Ave. Free. 301-215-6660 or www.bethesda.org.

Opera and the Holocaust

"Brundibar," Hans Krasa's opera about children who raise money for their family and lose it to an evil organ grinder, will be performed this weekend in Bethesda. Holocaust survivor Ela Weissberger will speak about her wartime experiences one hour before each performance. Noon and 2 p.m. Saturday and Sunday. The Round House Theatre, 4545 East West Hwy., Bethesda. A concert version of the opera will be presented at 6 p.m. Tuesday at the Kennedy Center's Millennium Stage, 2700 F St. NW in the District. Free; reservations required. 301-634-2222 or www.glenechopark.org. 202-448-3465 or education@dc-opera.org.

Children's Play

"Alexander and the Terrible, Horrible, No Good, Very Bad Day," by Judith Viorst and Shelly Markham, will be performed by the Adventure Theatre Repertory. 7:30 p.m. tomorrow, 10:30 a.m. Saturday, 3 p.m. Sunday, 10:30 a.m. and 3 p.m. Tuesday and 3 p.m. Aug. 20. Gaithersburg Arts Barn, 311 Kent Square Rd., Gaithersburg. $10; Gaithersburg residents, $8. 301-258-6394.