Concerts

DAVID BACH CONSORT -- 7-8:30 p.m. Thursday. Jazz, rock and funk. Watkins Regional Park, 301 Watkins Park Dr., Upper Marlboro. Free. 301-218-6700.

THE SWANNS -- 7:30-9:30 p.m. Friday. Family jazz and rhythm-and-blues group, part of the 26th annual Montpelier Summer Concert Series. Montpelier Mansion grounds, Route 197 and Muirkirk Road, Laurel. Free. 301-776-2805.

MIKE SURRATT & THE CONTINENTALS -- 2 p.m. Saturday. Swing and Latin music. Town Green Park on Ninth Street in Old Town Bowie. Free. 301-809-3078.

For Children

PUPPET SHOW -- 10-11 a.m. Thursday. Nature-oriented show for ages 2-5. Clearwater Nature Center, 11000 Thrift Rd., Clinton. Reservations, $2. 301-297-4575.

SNAKES ALIVE HIKE -- 11 a.m.-noon. Friday. Children 6 and older look for snakes. Clearwater Nature Center, 11000 Thrift Rd., Clinton. Reservations, $2. 301-297-4575.

HOOP DREAMS BASKETBALL -- 10 a.m.-6 p.m. Saturday. Children ages 7-14 will compete in a 3-on-3 basketball tournament and a half-time 3-point shooting contest. Suitland Community Center, 5600 Regency Lane, Suitland. Spectators, free; team, $15; 3-point shoot-out participants, $2. 301-736-3518.

SUNDAY SUMMER FUN -- 2-4 p.m. Sunday. For ages 5-12, 19th-century activities and crafts. Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. $3. 301-464-5291.

Theater

"GREASE" -- 8 p.m. Saturday. Prince George's County Summer Teen Theater presents the popular musical about high school in the 1950s. High Point High School, 3601 Powder Mill Rd., Beltsville. Adults, $10; students and seniors, $8. 301-723-3450.

Lectures and Literature

TONI SIMMONS -- 5 p.m. Saturday. The children's author will read "The Cheese Chase," a picture book that retells the African-American folktale "Why Dogs Chase Cats." Karibu Books, Bowie Town Center, 15624 Emerald Way, Bowie. 301-352-4110.

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-12:45 p.m. Tuesdays, Thursdays and Saturdays; 7-7:45 p.m. Sundays. A guided tour aboard a pontoon to search for 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 mountain bicycle and helmet. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. $3. 301-627-6074.

AFRICAN/CARIBBEAN DANCE WORKOUT -- 10-11:15 a.m. Saturdays. An intense workout for ages 16 and older. Mount Rainier Nature and Recreation Center, 4701 31st Pl., Mount Rainier. $7. 301-927-2163.

CHESAPEAKE BAY CRITICAL-AREA DRIVING TOUR -- 10 a.m.-3 p.m. Sundays. A self-guided, four-mile driving tour with interpretive stops, including an observation tower and a timber bridge over scenic wetlands, highlighting critical areas of the Chesapeake Bay and Patuxent River. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. Free. 301-627-6074.

DROP-IN WATER AEROBICS -- 6:30-7:30 p.m. Tuesdays. Low-impact exercise class in the water. Ellen Linson Swimming Pool, 5211 Paint Branch Pkwy., College Park. $7. 301-277-3717.

Exhibitions

"NORMANDY PORTRAITS" -- Through Aug. 21. Photographs and personal histories commemorating the 60th anniversary of the Normandy invasion. Montpelier Cultural Arts Center, 12826 Laurel-Bowie Rd., Laurel. Free. 301-953-1993.

"THROUGH A PINHOLE, CLEARLY" -- Through Aug. 28. Group exhibition by photographers exploring the diverse possibilities of pinhole cameras. Main Gallery, John Addison Concert Hall at Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Free. 301-203-6070.

"THIS FAIR LADY: THE LIFE OF LETTICE LEE" -- Through Sept. 26. Exhibition includes artifacts from Lee, who lived at Darnall's Chance between 1748 and 1776. Darnall's Chance House Museum, 14800 Gov. Oden Bowie Dr., Upper Marlboro. Admission $3, seniors $2, ages 5-18 $1. 301-952-8010.

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

"HORACE CAPRON AT 200: A FOUNDER'S LIFE" -- Through December. Exhibition about a founder of Laurel who is also known internationally. The Laurel Museum, 817 Main St., Laurel. Museum hours: 10 a.m.-2 p.m. Wednesdays and the first Friday of the month; 1-4 p.m. Sundays. Free. 301-725-7975.

"PLEASE BE SEATED" -- Ongoing. Nineteenth-century chairs, sofas, stools and benches from the Riversdale House Museum's permanent collection. 4811 Riverdale Rd., Riverdale. $3; seniors, $2; ages 5-18, $1. 301-864-0420.

"SSS . . . WHEN THE IRON WAS HOT: AFRICAN AMERICAN IRONWORKERS IN LAUREL/MUIRKIRK 1730-1930" -- Through March 2005. Exhibition examines 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.

"LIVING THE HEALTHY LIFE: SPORTS, HEALTH AND FITNESS IN THE NEW DEAL ERA" -- Ongoing. The development of health and fitness awareness through sports, government, city planning and daily life in the 1930s and '40s. Greenbelt Museum, 15 Crescent Rd., Greenbelt. 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 chronicling 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

REGIONAL HUNTER/JUMPER HORSE SHOW -- 8 a.m.-5 p.m. Sunday. Horse show in the outdoor rings. The Prince George's Equestrian Center, 14900 Pennsylvania Ave., Upper Marlboro. Free. 301-952-7999.

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