GORDON CHAMBERS -- 6:30 p.m. tomorrow. The singer will perform selections from his debut CD, "Introducing Gordon Chambers." Karibu Books, the Mall at Prince George's, 3500 East West Hwy., Hyattsville. Free. 301-559-1140.
PSALMS 150 -- 6 p.m. Saturday. Gospel music; bring a lawn chair or blanket. Suitland Community Center, 5600 Regency Lane, Suitland. Free. 301-736-3518.
DIXIE POWER TRIO -- sunset Sunday. Swing. Robert V. Setera Amphitheater, Allen Pond Park, 3330 Northview Dr., Bowie. Free. 301-809-3078.
GRIDLOCK BAND -- 7:15 p.m. Wednesday. Soul. Stephen Decatur Community Center, 8200 Pinewood Dr., Clinton. Free. 301-297-4648.
CREEK HIKE -- 10 a.m. tomorrow. Hikers will use dip nets to see what creatures live in a local creek; dress for wet conditions. Ages 6 and older; reservations required. Clearwater Nature Center, 11000 Thrift Rd., Clinton. $3. 301-297-4575.
FOOSBALL TOURNAMENT -- 7 p.m. tomorrow. Prizes awarded for first and second place. Ages 12-17. Langley Park Community Center, 1500 Merrimac Dr., Hyattsville. $8. 301-445-4508.
FISHING DERBY AND BIRD WATCHING -- 8 a.m. Saturday. Bring binoculars, rod, reel and tackle. Prizes will be awarded for the first fish caught, most fish, and smallest and largest fish. Fee includes transportation and bait. Ages 6-12, reservations required. Seat Pleasant Activity Center, 5720 Addison Rd., Seat Pleasant. $4. 301-773-6685.
LIVE ANIMAL SHOW -- 10 a.m. Tuesday. Ages 2 and older; reservations required. Clearwater Nature Center, 11000 Thrift Rd., Clinton. $2. 301-297-4575.
NATIONAL ICE CREAM DAY CELEBRATION -- 4 p.m. Wednesday. Ages 5-12; reservations required by Monday. Langley Park Community Center, 1500 Merrimac Dr., Hyattsville. Free. 301-445-4508.
DEEP WATER WALKING -- 7-8 a.m. Mondays-Fridays. Fitness instructor leads a stress-free water workout, for those 18 and older. Glenarden/Theresa Banks Complex, 8615-A McLain Ave., Glenarden. $6. 301-772-5515.
DROP-IN WATER AEROBICS -- 7:30-8:30 p.m. today and Tuesday. Water exercise class open to those 18 and older. Glenarden/Theresa Banks Complex, 8615-A McLain Ave., Glenarden. $7; seniors $6. 301-772-5515.
KAYAK KAPER -- 9 a.m.-noon. Saturday. Guided kayak trip through the Patuxent River's tidal wetlands; participants should bring sunscreen, a hat and drinking water. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. $18. Reservations, 301-627-6074.
RIVER ECOLOGY BOAT TOUR -- 2 p.m. Sunday. A park naturalist leads a pontoon tour of the Patuxent River. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. Free. Reservations, 301-627-6074.
CHESAPEAKE BAY CRITICAL-AREA DRIVING TOUR -- 10 a.m.-3 p.m. Sunday. Self-guided four-mile driving tour includes interpretive stops, an observation tower and a timber bridge over wetlands. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. Free. 301-627-6074.
LAKE ARTEMESIA HIKE -- 6:30 p.m. Wednesday. A naturalist leads a walk around the lake; for ages 18 and older. Mount Rainier Nature and Recreation Center, 4701 31st Pl., Mount Rainier. Free. 301-927-2163.
MIKE SHAFFER -- through Aug. 19. Works from the artist's "Line Paintings" series. Montpelier Cultural Arts Center, Library Gallery, 12826 Laurel-Bowie Rd., Laurel. Free. 301-953-1993.
"RUB THE OILS AND STREW THE POWDERS -- THE LEGACY OF EUROPEAN HERBS IN EARLY AMERICAN MEDICINE AND CUISINE" -- through May 2007. Prints from the 16th, 17th and 18th centuries, as well as a look at how the common dandelion has been regarded through the ages. Montpelier Mansion, Route 197 and Muirkirk Road, Laurel. Adults, $3; seniors, $2; ages 5-18, $1; ages 4 and younger, free. 301-953-1376.
"WISH YOU WERE HERE: POSTCARDS OF LAUREL" -- ongoing. Examples from the turn of the 20th century to today depict Laurel's history and illustrate the evolution of postcards. The Laurel Museum, 817 Main St., Laurel. Free. 301-725-7975.
"LIVING THE HEALTHY LIFE: SPORTS, HEALTH AND FITNESS IN THE NEW DEAL ERA" -- ongoing. Chronicle of the evolution of health and fitness awareness during the 1930s and 1940s. 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 the signing of the armistice in 1953. National Archives at College Park, 8601 Adelphi Rd. Free. 866-272-6272.
MARYLAND SADDLE ASSOCIATION HORSE SHOW -- 8 a.m.-6 p.m. Saturday and Sunday. Hunter-jumper horse show. Prince George's Equestrian Center, 14900 Pennsylvania Ave., Upper Marlboro. Free. 301-952-7999.
SILVERADO ARMS AND MILITARIA SHOW -- 9 a.m.-5 p.m. Saturday, 9 a.m.-3 p.m. Sunday. Collectibles and antique arms will be available for sale. Show Place Arena, 14900 Pennsylvania Ave., Upper Marlboro. $7, $5 seniors, 12 and younger free with a paying adult. 301-952-7999.
HOME FESTIVAL -- noon to 4 p.m. Saturday. See designs and sculptures of model homes, with workshops on home improvement. Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Free. 301-203-6070.
KETTERING DAY -- noon to 6 p.m. Saturday. Entertainment, health screenings, pony rides, moon bounce and food vendors. All ages. Kettering/Largo Community Center, 431 Watkins Park Dr., Upper Marlboro. Free admission, nominal fees for some activities and food. 301-390-8390.
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