GLENARDEN STORY TIME, ages 2-5, limited to 35 children. 10:30 a.m., Glenarden Library, 8724 Glenarden Pkwy., Glenarden. Free. 301-772-5477.
HYATTSVILLE CHESS CLUB, all ages, tips from instructor Ted Fagan. 7 p.m., Hyattsville Library, 6530 Adelphi Rd., Hyattsville. Free. 301-985-4690.
SENIOR CENTER BINGO, ages 55 and older. 9:30 a.m.-2 p.m. Fridays and Tuesdays, Camp Springs Senior Center, 6420 Allentown Rd., Camp Springs. Free. 301-449-0490.
CLINTON CREEK HIKE, children 6 and older will use dip nets to find creek-dwelling creatures; participants should 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.
AIR MUSEUM MOVIE, "Flight of the Navigator" (1986), with popcorn and lemonade. 2 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Free, with regular museum admission of $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029 or www.collegeparkaviationmuseum.com.
LAUREL DRAGONFLY HIKE, for all ages, how to identify local species. 10 a.m.-noon, National Wildlife Visitor Center, Powder Mill Road, between the Baltimore-Washington Parkway and Route 197, Laurel. Free; registration required. 301-497-5887.
HYATTSVILLE STORY TIME, for ages 3-6, in English and Spanish. 10:30 a.m., Hyattsville Library, 6530 Adelphi Rd., Hyattsville. Free. 301-985-4690.
WILDFLOWER HIKE, for ages 16 and older, a discussion of the role of wildflowers in the ecosystem and methods of identifying them; participants should bring a field guide, water and a magnifying glass. 10:15 a.m.-12:15 p.m., Patuxent Research Refuge, North Tract, Route 198, between Baltimore-Washington Parkway and Route 32, Laurel. Free; reservations required. 301-497-5887.
AIR MAIL ANNIVERSARY, stories and crafts celebrating the 87th anniversary of the first U.S. postal air mail flight, which took place at the College Park Airport. Noon-4 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029.
NATURE CENTER PUPPET SHOW, for ages 2 and older. 10-11 a.m., Clearwater Nature Center, 11000 Thrift Rd., Clinton. $2; nonresidents of Prince George's and Montgomery counties, $3. Registration required. 301-297-4575.
DISTRICT HEIGHTS BEDTIME STORIES, for ages 2-6. 7 p.m., Spauldings Library, 5811 Old Silver Hill Rd., District Heights. Free. 301-817-3750.
CAREGIVERS DISCUSSION, for grandparents and others caring for a relative's child, a panel of child welfare professionals will discuss legal and financial issues, and childen's physical, mental and emotional health issues. Sponsored by Kinship Care Resource Center of Maryland. 11 a.m.-2 p.m., Prince George's County Department of Social Services, 925 Brightseat Rd., Landover. Free; limited to the first 50 people. Registration required. 866-951-4177.
AVIATION CRAFTS. Noon-4 p.m. Tuesdays through Aug. 30, College Park Aviation Museum, 1985 Cpl. Frank Scott Dr., College Park. Workshop fee, $2; regular admission also required, $4; seniors, $3; ages 2-18, $2; ages 1 and younger, free. 301-864-6029 or www.collegeparkaviationmuseum.com.
ALL ABOUT BATS, for ages 5-7, an interactive program about bat facts and myths with stories and songs. 1-2 p.m., National Wildlife Visitor Center, Powder Mill Road, between Baltimore-Washington Parkway and Route 197, Laurel. Free; registration required. 301-497-5887.
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.
BLADENSBURG FRIENDS OF THE LIBRARY, discussion of fundraising, volunteering and special projects. 6:30 p.m., Bladensburg Library, 4820 Annapolis Rd., Bladensburg. Free. 301-927-4916.
LINE DANCING, for ages 60 and older. 10 a.m.-noon, 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. 4 p.m., Hillcrest Heights Library, 2398 Iverson St., Hillcrest Heights. Free. 301-630-4900.
LARGO STORY TIME, for ages 3-5. 11 a.m., Largo-Kettering Library, 9601 Capital Lane, Largo. Free. 301-336-4044.
RIVERDALE AREA FARMERS MARKET, includes watermelons, peaches, berries, 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. 301-927-6381.
-- Compiled by LISA MARTIN
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