Concerts

THE JOKERS -- 2 p.m. Saturday. Rock and roll concert, part of the Old Town Bowie Saturday Concert Series. Town Green, Ninth Street and Route 564, Bowie. Free. 301-809-3078.

For Children

"JAY JAY THE JET PLANE" AFTERNOON -- 2 p.m. tomorrow. Episodes of "Jay Jay the Jet Plane." Popcorn and lemonade included. College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Free with museum admission: adults, $4; seniors, $3; 18 and younger, $2. 30l-864-6029.

A DAY AT THE RACES -- Noon-2 p.m. Saturday. For ages 5-10. Sack races, 50-yard dashes, and egg and spoon races. Kettering/Largo Community Center, 431 Watkins Park Dr., Upper Marlboro. Free. Registration, 301-390-8390.

PRETEEN BACK-TO-SCHOOL SOCIAL -- 6 p.m. Saturday. For ages 10-12. DJ music, dancing and games. Berwyn Heights Community Center, 6200 Pontiac St., Berwyn Heights. $4. 301-345-2808.

MARBLES TOURNAMENT -- 3-4 p.m. Tuesday, for ages 6-12. Bring your own marbles. College Park Youth Services Center, 4912 Nantucket Rd., College Park. $3. 301-345-4425.

Theater

"STAGE DOOR" -- 8 p.m. Saturday, 2 p.m. Sunday. Summer youth theater production of the play by George S. Kaufman and Edna Ferber. Laurel Mill Playhouse, 508 Main St., Laurel. $12.50; children and seniors, $10. 301-617-9906.

Lectures and Literature

ANTHONY BROWDER -- 6:30 p.m. Friday. The founder of the Institute of Karmic Guidance will discuss his book "Egypt on the Potomac: A Guide to Decoding Egyptian Architecture and Symbolism in Washington, D.C." Karibu Books, Prince George's Plaza, 3500 East West Highway, Hyattsville. Free. 301-559-1140.

Sports and Recreation

DEEP-WATER WALKING -- 7-8:30 p.m. Tuesdays and Thursdays. Pool workout for ages 18 and older. Glenarden/Theresa Banks Complex, 8615-A McLain Ave., Glenarden. $6. 301-772-5515.

ANACOSTIA RIVER BOAT TOURS -- Noon, Tuesdays, Thursdays and Saturdays; 7 p.m. Sundays. Guided 45-minute pontoon tours to observe birds and other wildlife. Bladensburg Waterfront Park, 4601 Annapolis Rd., Bladensburg. Free. 301-779-0371.

BICYCLE NATURE TOUR -- 9-11 a.m. Saturday. Guided tour of park trails for ages 8 and older; bring a bicycle and helmet. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. $3. 301-627-6074.

CHESAPEAKE BAY CRITICAL-AREA DRIVING TOUR -- 10 a.m.-3 p.m. Sundays. Self-guided, four-mile driving tour includes interpretive stops, an observation tower and a timber bridge over scenic wetlands. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. Free. 301-627-6074.

Exhibitions

"THROUGH A PINHOLE, CLEARLY" -- Through Saturday. Group exhibition by photographers exploring the possibilities of the pinhole camera. Main Gallery, Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Free. 301-203-6070.

"THIS FAIR LADY: THE LIFE OF LETTICE LEE" -- Through Sept. 26. Artifacts from the life of Lettice Lee, resident of historic Darnall's Chance from 1748 to 1776. Darnall's Chance House Museum, 14800 Gov. Oden Bowie Dr., Upper Marlboro. $3; seniors, $2; ages 5-18, $1. 301-952-8010.

"GETTING OUT THE VOTE: THE POLITICAL SCENE IN THE 1800s" -- Through Nov. 30. Political memorabilia of the era. Surratt House Museum, 9118 Brandywine Rd., Clinton. $3; seniors, $2; ages 5-18, $1. 301-868-1121.

"SSS . . . WHEN THE IRON WAS HOT: AFRICAN AMERICAN IRONWORKERS IN LAUREL/MUIRKIRK 1730-1930" -- Through March 31. An exhibition celebrating the contribution of black ironworkers in Laurel. Montpelier Mansion, Route 197 and Muirkirk Road, Laurel. $3; seniors, $2; ages 5-18, $1. 301-953-1376.

"PLEASE BE SEATED" -- Ongoing. Nineteenth-century chairs, sofas, stools and benches from the museum's permanent collection. Riversdale House Museum, 4811 Riverdale Rd., Riverdale. $3; seniors, $2; children, $1. 301-864-0420.

"LIVING THE HEALTHY LIFE: SPORTS, HEALTH AND FITNESS IN THE NEW DEAL ERA" -- Ongoing. Exhibition examines the evolution of health and fitness awareness during the 1930s and '40s. Greenbelt Museum, 15 Crescent Rd., Greenbelt. Free. 301-507-6582.

RADIO PREMIUMS -- Ongoing. Memorabilia related to radio serials of the 1930s, '40s and '50s, including "Radio Orphan Annie," "Buck Rogers in the 25th Century" and "Captain Midnight." Radio-Television Museum, 2608 Mitchellville Rd., Bowie. Free. 301-390-1020.

"THE FORGOTTEN WAR REMEMBERED: AMERICA AND THE KOREAN WAR" -- Ongoing. Includes 20 photographs documenting the war, from growing tension during the late 1940s through signing of the armistice in 1953. National Archives at College Park, 8601 Adelphi Rd. Free. 301-713-6800.

Miscellaneous

MARYLAND SADDLE ASSOCIATION HORSE SHOW -- 8 a.m.-6 p.m. Saturday and Sunday. Hunter/jumper show will take place in the outdoor rings. Prince George's Equestrian Center, 14900 Pennsylvania Ave., Upper Marlboro. Free. 301-952-7999.

CULTURAL ARTS SHOWCASE -- 7-8:30 p.m. Saturday. Jazz and rhythm-and-blues music, poetry and a dramatic performance by the Hillcrest Heights Performing Arts Ensemble. Hillcrest Heights Community Center, 2300 Oxon Run Dr., Hillcrest Heights. Free. 301-505-0896.

HISTORY ON THE RIVER BOAT TOUR -- 1-3 p.m. Sunday. For ages 14 and older. A historian leads a tour of notable sites on the mid-Patuxent River aboard a pontoon; bring your own snacks. Billingsley House Museum, 6900 Green Landing Rd., Upper Marlboro. $6. Reservations, 301-627-0730.

HUNTINGTON DAY -- 2-6 p.m. Sunday. A celebration of the Old Bowie neighborhood. Face painting, a moon bounce, roller-skating, arts and crafts, kickball, horseshoes, volleyball and basketball. Huntington South Neighborhood Park, 13311 11th St., Bowie. Free. 301-464-3725.

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