"BRAIN BENDERS," for ages 6-12, looking at everyday objects with a scientific eye; a traveling show presented by the Maryland Science Center. 2 p.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
UPPER MARLBORO PUPPET SHOW, for ages 2 and older; includes a craft. 2-3 p.m., Watkins Nature Center, 301 Watkins Park Dr., Upper Marlboro. $2; nonresidents of Prince George's and Montgomery counties, $3. Registration required. 301-218-6702.
CLINTON CREEK HIKE, children 6 and older will use dip nets to see what creatures live in the creek; dress for wet conditions. 10-11:30 a.m., Clearwater Nature Center, 11000 Thrift Rd., Clinton. $2; nonresidents of Prince George's and Montgomery counties, $3. Registration required. 301-297-4575.
AVIATION MUSEUM WORKSHOP, a tour of the gallery, plus a workshop to decorate a plastic-foam flier to take home. Noon-4 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Free with museum admission: $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029.
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 the Baltimore-Washington Parkway and Route 32, Laurel. Free; registration required. 301-497-5887.
LAUREL PUPPET SHOW, includes face painting, arts and crafts and refreshments. 11 a.m., Deerfield Run Community Center, 13000 Laurel-Bowie Rd., Laurel. Free. 301-953-7882.
VINTAGE TELEVISION, "Captain Video and His Video Rangers," two episodes of the 1949 program. 1-4 p.m. Saturday and Sunday, the Radio and Television Museum, 2608 Mitchellville Rd., Bowie. Free; donations accepted. 301-390-1020 or www.radiohistory.org.
FALL GARDENING WORKSHOP, master gardeners discuss soil preparation and composting, dividing perennials and planting bulbs. A question-and-answer session follows; bring fresh 3- to 4-inch samples with foliage from your plants for evaluation. 1:30-4 p.m., Beltsville Library, 4319 Sellman Rd., Beltsville. Free. 301-937-0294.
SONG WRITING WORKSHOP AND CONCERT, bluegrass musician David Norris offers song writing advice, including creating melody paths and copyright regulations. Workshop, 5-7 p.m.; concert, 8 p.m. Accokeek Foundation Education Center, 3400 Bryan Point Rd., Accokeek. Workshop, $15, registration required. Concert, $10. 301-283-2113, Ext. 13.
BOWIE FARMERS MARKET, vegetables, fruits, flowers and baked goods. 8 a.m.-noon, Gallant Fox Lane and Route 197, Bowie. Free. 301-809-3076.
GLENN DALE NATURE STROLL, for ages 5-11, a walk to identify trees, plants and flowers; includes a workshop to make a keepsake book and sachets. 2-4 p.m., Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. $3; reservations required. 301-464-5291.
DISTRICT HEIGHTS STORY TIME, for ages 2-6. 7 p.m., Spauldings Library, 5811 Old Silver Hill Rd., District Heights. Free. 301-817-3750.
THEATER AUDITIONS, for men ages 40-55 and women ages 25-55, cold readings from a script for roles in Neil Simon's comedy "Last of the Red Hot Lovers." One man's part and three women's parts are available. Performances begin Oct. 14 and end Nov. 5. Sponsored by the Greenbelt Arts Center. 7:30 p.m. Aug. 1-2, at the center, 123 Centerway, Greenbelt. 301-441-8770 or www.greenbeltartscenter.org.
DISTRICT HEIGHTS MAGIC AND SCIENCE, representatives from the Maryland Science Center demonstrate chemistry with things that fizz, foam and flash. 1 p.m., Spauldings Library, 5811 Old Silver Hill Rd., District Heights. Free. 301-817-3750.
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. Free. 301-627-0977.
PUPPET SHOW, the Stevens Puppets perform "The Wizard of Oz." 10:30 a.m., Baden Library, 13603 Baden-Westwood Rd. Free. 301-888-1152.
BELTSVILLE STORY TIME, for ages 3-5. 10:30 a.m., Beltsville Library, 4319 Sellman Rd., Beltsville. Free. 301-937-0294.
RIVERDALE AREA FARMERS MARKET, watermelons, peaches, berries and other fruits, vegetables, flowers, baked goods, eggs, jams, baskets and honey. 3-7 p.m., Riverdale Park Town Center, Queensbury Road and Rhode Island Avenue, Riverdale Park. Free. 301-927-6381.
LIBRARY BOARD MEETING, the Prince George's County Memorial Library System Board of Library Trustees. 8 p.m., Administrative Offices, 6532 Adelphi Rd., Hyattsville. Free. 301-699-3500.
-- Compiled by LISA MARTIN
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