LARGO STORY TIME, for ages 3-5. 11 a.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
PUPPET SHOW, the Stevens Puppets perform "The Wizard of Oz." 2 p.m. Hyattsville Library, 6530 Adelphi Rd., Hyattsville. Free. 301-985-4690.
SENIOR CENTER BID WHIST, weekly games for ages 55 and older. 12:30-3 p.m., Camp Springs Senior Center, 6420 Allentown Rd., Camp Springs. Free. 301-449-0490.
FARMERS MARKET, vegetables, watermelons, peaches, berries, flowers, baked goods, eggs, jams, baskets and honey. 3-7 p.m., Riverdale Park Town Center, Queensbury Road and Rhode Island Avenue, Riverdale Park. Admission, free. 301-927-6381.
FAMILY FUN NIGHT, includes a puppet show, a magic show, face-painting, a moon bounce and clowns, sponsored by the Hyattsville Recreation Department. 6:30-8 p.m., 31st and Hamilton streets, Hyattsville. Free; refreshments for sale. 301-985-5020.
OLD SCHOOLHOUSE, tours of a one-room schoolhouse built in 1896, sponsored by the Maryland-National Capital Park and Planning Commission. 11 a.m.-3 p.m. Friday and 1-4 p.m. Sunday, 6116 Seabrook Rd., Seabrook. Free. 301-464-5291.
WRITERS GROUP, includes open readings of all types of writing, a publishing workshop and spontaneous writing sessions, sponsored by the Greenbelt Writers Group. 7:30 p.m., Greenbelt Community Center, 15 Crescent Rd., Greenbelt. Admission, free; annual membership fee to join the group, $7.50. 301-204-3579 or www.geocities.com/thegwg.
OUTDOOR MOVIE, "The SpongeBob SquarePants Movie" (2004). 8:30 p.m., Granville Gude Park, 8300 Mulberry St., Laurel. Free. 301-490-3530.
FARMERS MARKET, fresh fruits and vegetables in an open-air market, sponsored by Maryland-National Capital Park and Planning Commission. 7 a.m.-noon, Ellen Linson Swimming Pool parking lot, 5211 Paint Branch Pkwy., College Park. Free. 301-277-3717.
BLADENSBURG BIRD-WATCHING, for all ages; children 16 and younger must be accompanied by an adult. A search for birds along the Anacostia River; binoculars provided. 8-10 a.m., Bladensburg Waterfront Park, 4601 Annapolis Rd., Bladensburg. $2; nonresidents of Prince George's and Montgomery counties, $3. Reservations required. 301-779-0371.
BUTTERFLY HIKE, for ages 10 and older, a guided 21/2-mile hike to learn about butterflies and their role in the ecosystem, and to identify species common to Maryland. Field guides recommended; bring water and dress appropriately. 8:30-11:30 a.m., Patuxent Research Refuge, North Tract, Route 198, between Baltimore-Washington Parkway and Route 32, Laurel. Free; registration required. 301-497-5887.
FARMERS MARKET, vegetables, fruits, flowers and baked goods. 8 a.m.-noon, Gallant Fox Lane and Route 197, Bowie. Admission, free. 301-809-3076.
COMMUNITY DAY, for all ages; children 6 and younger must be accompanied by an adult. Games, face-painting, arts and crafts, a cookout, refreshments, a basketball tournament and music provided by a disc jockey. 2-6 p.m., Huntington Community Center, 13022 Eighth St., Bowie. Free. 301-464-3725.
ONLINE HOMEWORK HELP, for students in grades 4-12, tutoring in math, science, social studies and English, from teachers, university professors and graduate students. 2 p.m.-midnight daily; Spanish-speaking tutors in math and science, 2-10 p.m. Sundays to Thursdays. Available through the Prince George's County Memorial Library System's Web site, www.pgcmls.info.
STORY TIME, for ages 3-7. 7 p.m., New Carrollton Library, 7414 Riverdale Rd. Free. 301-459-6900.
FARMERS MARKET, seasonal fruits and vegetables. 2-6 p.m., Queens Chapel Town Center, rear parking lot, Queens Chapel Road and Hamilton Street, Hyattsville. Admission, free. 301-627-0977.
KNITTING AND CROCHETING, for enthusiasts ages 10 and older of all experience levels. 7 p.m. the fourth Tuesday of each month, Savory Cafe, 7071 Carroll Ave., Takoma Park. Free. 301-587-7174.
WOMEN'S SELF-DEFENSE CLASS, for women 55 and older. 12:30-2:30 p.m., Camp Springs Senior Center, 6420 Allentown Rd., Camp Springs. Free. 301-449-0490.
ADOPTION WORKSHOP, representatives of Adoptions Together will discuss the process for adopting a black child age 8 or older and available support services; adoptive parents must be residents of Maryland, Virginia or the District. 7-8:30 p.m., Surratts-Clinton Library, 9400 Piscataway Rd., Clinton. 301-439-2900 or www.adoptionstogether.org.
HYATTSVILLE CHESS CLUB, for all ages, tips from instructor Ted Fagan. 7 p.m., Hyattsville Library, 6530 Adelphi Rd., Hyattsville. Free. 301-985-4690.
-- Compiled by LISA MARTIN
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