PROJECT NATALE -- 2 p.m. Saturday. Jazz. Town Green Park, 13050 Ninth St., Bowie. (Rain location: Knights of St. John, 12th and Chestnut streets, Bowie.) Free. 301-809-3078.
U.S. ARMY FIELD BAND JAZZ AMBASSADORS -- 7 p.m. Sunday. Jazz. Robert V. Setera Amphitheater, Allen Pond Park, 3330 Northview Dr., Bowie. Free. 301-809-3068.
FISHING CLINIC -- 9-11 a.m. Saturday. Children ages 5-12 can learn the basics at an eight-acre catch-and-release bass pond. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. $6; reservations required. 301-627-6074.
NATURE CLUB -- 2:30-3:30 p.m. Saturday. Crafts, stories and activities about nature and ecology. Ages 6-12. Bladensburg Waterfront Park, 4601 Annapolis Road, Bladensburg. $3. 301-779-0371.
TABLE TENNIS WORKSHOP -- 7-8:30 p.m. Wednesday. An instructor teaches the basics. Ages 10 and older. Temple Hills Community Center, 5300 Temple Hill Road, Temple Hills. Free. 301-894-6616.
JOE FORMICHELLA AND JESSE NORWOOD JR. -- 6:30 p.m. Thursday. The authors will discuss "Here's to You Jackie Robinson: The Legend of the Prichard Mohawks." Karibu Books, Bowie Town Center, 15624 Emerald Way, Bowie. 301-352-4110.
ANACOSTIA RIVER BOAT TOUR -- Noon today, Saturday and Tuesday. Wildlife observation tour led by a park naturalist. Bladensburg Waterfront Park, 4601 Annapolis Rd., Bladensburg. Free. 301-779-0371.
DEEP-WATER WALKING -- 7-8 a.m. Mondays-Fridays. A fitness instructor leads a stress-free water workout, for people 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 for people 18 and older. Glenarden/Theresa Banks Complex, 8615-A McLain Ave., Glenarden. $7; seniors, $6. 301-772-5515.
SUNSET BOAT TOUR -- 6-8 p.m. tomorrow. A look at waterfowl and hilltop historic homes aboard a pontoon, for ages 6 and older. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. $4; reservations required. 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.
RIVER ECOLOGY BOAT TOUR -- 2 p.m. Sunday. Pontoon tour covers wetlands, wildlife and history. Patuxent River Park, 16000 Croom Airport Rd., Upper Marlboro. Free; reservations required. 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.
"RAISE THE ROOF" -- Through Sept. 24. The concept of "home" is interpreted by artists, architects, designers and schoolchildren. John Addison Concert Hall, Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Free. 301-203-6070.
"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 through 19th 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. 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. Radio-Television Museum, 2608 Mitchellville Rd., Bowie. Free. 301-390-1020.
"THE FORGOTTEN WAR REMEMBERED: AMERICA AND THE KOREAN WAR" -- Ongoing Twenty 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.
COMMUNITY FLEA MARKET -- 8:30 a.m. Saturday. Langley Park Community Center, 1500 Merrimac Dr., Hyattsville. Free. 301-445-4508.
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