SENIOR CENTER BID WHIST, for ages 55 and older. 12:30-3 p.m., Camp Springs Senior Center, 6420 Allentown Rd., Camp Springs. Free. 301-449-0490.
HILLCREST HEIGHTS STORY TIME, for ages 3-5. 10:30 a.m., Hillcrest Heights Library, 2398 Iverson St. Free. 301-630-4900.
ANIMAL TRACKING CLASS, for ages 6-12. A park ranger shows how to identify animals by the signs they leave. 10-11:30 a.m., Clearwater Nature Center, 11000 Thrift Rd., Clinton. $3; nonresidents of Prince George's and Montgomery counties, $4; registration required. 301-297-4575.
HEALTHY EATING TIPS, for ages 55 and older, registered nurse Anne Hayes of the Prince George's County Health Department will discuss safe and healthy picnic and cookout foods. 10:30 a.m., Bowie Senior Center, 14900 Health Center Dr., Bowie. Free. 301-809-2300 www.bowieseniorcenter.org.
LARGO CRAFTS AND GAMES, for ages 5-12, jump-rope, chalk art and other outdoor activities. 3 p.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
BLADENSBURG CANOEING, for all ages, children 16 and younger must be accompanied by an adult. A park naturalist leads a canoe tour to look for wildlife in the Kenilworth Aquatic Gardens; canoes, paddles and life jackets provided. 9:30 a.m.-noon, Bladensburg Waterfront Park, 4601 Annapolis Rd., Bladensburg. $10; nonresidents of Prince George's and Montgomery counties, $12. Registration required. 301-779-0371.
VINTAGE TELEVISION, "The Ed Wynn Show," two episodes from 1949. 1-4 p.m. Saturday and Sunday. Radio and Television Museum, 2608 Mitchellville Rd., Bowie. Free; donations accepted. 301-390-1020 or www.radiohistory.org.
CLINTON BOOK TALK, science journalist Tim Friend discusses "Animal Talk: Breaking the Codes of Animal Language," about how animals use sound, visual signals and biological and chemical methods of communication. 2 p.m., Surratts-Clinton Library, 9400 Piscataway Rd., Clinton. Free. 301-868-9200.
LAUREL NIGHT HIKE, for all ages, a guided hike to look and listen for owls, frogs, bats, bugs and other creatures. 8-9:30 p.m., Patuxent Research Refuge, North Tract, Route 198, between Baltimore-Washington Parkway and Route 32, Laurel. Free; registration required. 301-497-5887.
BOWIE FARMERS MARKET, includes vegetables, fruits, flowers and baked goods. 8 a.m.-noon, Gallant Fox Lane and Route 197, Bowie. Free. 301-809-3076.
GLENN DALE HISTORY EVENT, for all ages, 19th-century games and interactive activities and tours of the historic Marietta House, sponsored by the Prince George's County History Consortium. 1-5 p.m., Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. Free. 301-464-5291.
OXON HILL BLOOD DRIVE, sponsored by the Oxon Hill Friendly Lions Club and the American Red Cross; donations of used eyeglasses and hearing aids will be accepted for recycling. 2:30-7 p.m., Oxon Hill Fire Department, 7600 Livingston Rd., Oxon Hill. 301-839-2742.
SENIOR CENTER BRIDGE, for ages 60 and older. 9 a.m.-2 p.m., Langley Park Senior Center, 1500 Merrimac Dr., Langley Park. Free. 301-408-4343.
MAGIC SHOW, for ages 6-12, Michael Chamberlin performs sleight of hand and other illusions. 2 p.m., Fairmount Heights Library, 5904 Kolb St., Fairmount Heights. Free. 301-883-2650.
HYATTSVILLE FARMERS MARKET, seasonal fruits and vegetables. 2-6 p.m., Queens Chapel Town Center, rear parking lot, Queens Chapel Road and Hamilton Street, Hyattsville.
NEW CARROLLTON CONCERT, the Air Force Brass Quintet performs traditional and original music. 7 p.m., New Carrollton Library, 7414 Riverdale Rd. Free. 301-459-6900.
KNITTING AND CROCHETING GROUP, for ages 10 and older, all experience levels. 7 p.m. the fourth Tuesday of each month, Savory Cafe, 7071 Carroll Ave., Takoma Park. Free. 301-587-7174.
BELTSVILLE STORY TIME, for ages 3-5, 10:30 a.m., Beltsville Library, 4319 Sellman Rd., Beltsville. Free. 301-937-0294.
FAIRMOUNT HEIGHTS CHESS CLUB, for beginning and intermediate-level players of all ages, with instructor Ted Fagan. 5 p.m., Fairmount Heights Library, 5904 Kolb St., Fairmount Heights. Free. 301-883-2650.
CHILDREN'S HISTORY EVENT, for ages 2 and older accompanied by an adult, 19th-century folk and fairy tales, crafts, music and refreshments. 10-11:30 a.m., Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. $3; registration required. 301-464-5291.
"BRAIN BENDERS," children 6-12 learn how to look at everyday objects with a scientific eye; presented by the Maryland Science Center. 2 p.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
OUTDOOR HARRY POTTER MOVIE, "Harry Potter and the Prisoner of Azkaban" (2004). Bring a blanket and lawn chairs; refreshments will be sold. 8:45 p.m., Allen Pond Park, 3330 Northview Dr., Bowie. Free. 301-809-3068.
-- Compiled by LISA MARTIN
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