District Heights computer class, create an e-mail account and learn how to use it. 9:15 a.m., Spauldings Library, 5811 Old Silver Hill Rd., District Heights. Free. 301-817-3750.
$1 Baysox game, watch the home team take on the Harrisburg Senators for a bargain price. 7:05 p.m., Bowie Baysox, 4101 NE Crain Hwy., Bowie. Purchase online: general admission $1; reserved seats, $3; box seats, $6. 301-653-6139 or www.baysox.com.
Bladensburg family movie screening, “Are We Done Yet,” with Ice Cube. Dusk-9:30 p.m., Bladensburg Waterfront Park, 4601 Annapolis Rd. Free. 301-779-0371.
College Park Needle Arts Society, work on quilting, knitting, embroidery and counted cross-stitch projects. 9:30-11:30 a.m. Fridays, Old Parish House, 4711 Knox Rd., College Park. Free. 301-277-9630 or email@example.com.
Clinton dodge ball tournament, for ages 13-17. 7-10 p.m., Stephen Decatur Community Center, 8200 Pinewood Dr, Clinton. Free. 301-297-4648.
North Brentwood flag football game, for ages 10-17. 7-10 p.m., North Brentwood Community Center, 4012 Webster St. Free. 301-864-0756.
Upper Marlboro campfire, for age 2 and older, stories, animal show and roasted marshmallows. 7:30-9 p.m., Watkins Regional Park, 301 Watkins Park Dr., Upper Marlboro. $3; nonresidents of Prince George’s and Montgomery counties, $4. Reservations required. 301-699-2456.
Battle of Bladensburg visitor center fest, celebration of the opening of the new visitor center, which is focused on Maryland’s involvement in the War of 1812. Event features Anacostia River boat tours, War of 1812 reenactments, live music and family activities. Noon-5 p.m., Bladensburg Waterfront Park, 4601 Annapolis Rd. Free. 301-779-0371.
Largo community flea market, sponsored by the James C. Fletcher Jr. Council of the Knights of Columbus. Vendor space available for $20. 8:30 a.m.-1 p.m., St. Joseph Catholic Church, 2020 St. Joseph Dr., Largo. Admission free. 301-390-7150 or firstname.lastname@example.org.
Bladensburg canoeing and fishing, for all ages, learn basic canoe paddling and fishing techniques. 9 a.m.-3 p.m., Bladensburg Waterfront Park, 4601 Annapolis Rd. Free. 301-779-0371.
Lothian marsh ecology canoe trip, for age 7 and older, paddle along the Patuxent River wetlands. Bring water, sunscreen and lunch. 9 a.m.-1 p.m., Jug Bay Wetlands Sanctuary, 1361 Wrighton Rd., Lothian. Program, free; sanctuary admission, $10; registration required. 410-741-9330.
Upper Marlboro nature crafts, for ages 2-10, a story, meeting a live animal and craft-making. 10-11 a.m., Watkins Regional Park, nature center, 301 Watkins Park Dr., Upper Marlboro. $2; nonresidents of Prince George’s and Montgomery counties, $3. Reservations required. 301-699-2456.
Wildlife Conservation Day in Laurel, guided hikes, information on birding, wildlife photography and fishing, archery and firearm demonstrations and crafts; plus exhibits from Meade National Heritage Association and the National Wild Turkey Federation. 10 a.m.-2 p.m., Patuxent Research Refuge, North Tract, Route 198 between the Baltimore-Washington Parkway and Route 32, Laurel. Free. 301-497-5887.
Accokeek Stitch ’n Time club, join the club and learn how to spin and dye wool from the farm’s sheep. 1-4 p.m. the fourth Saturday of each month, Accokeek Foundation, 3400 Bryan Point Rd. Free. 301-283-2113.
College Park kite workshop, build and decorate a kite. 1 p.m., College Park Aviation Museum, 1985 Cpl. Frank Scott Dr. $8, registration required. 301-864-6029.
E-books assistance in District Heights, bring your Kindle, iPad, Nook or other e-reader device and learn how to download books and more. 1 p.m., Spauldings Library, 5811 Old Silver Hill Rd., District Heights. Free. 301-817-3750.
War of 1812 drill, watch reenactors practice their drills and learn how to fire a musket. 1-5 p.m., Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. $10. 301-464-5291.
Upper Marlboro water creatures, search a pond for fish, bugs, turtles and other species. 2-3 p.m., Merkle Wildlife Sanctuary, 11704 Fenno Rd., Upper Marlboro. Free, registration required. 301-888-1410.
Beltsville “Xtreme Teens” Frisbee game, for ages 10-17, throw a Frisbee at a portable target. 7-10 p.m., Beltsville Community Center, 3900 Sellman Rd. Free. 301-937-6613.
North Brentwood youth party, for ages 10-17, skating, music and refreshments. 7-10 p.m., North Brentwood Community Center, 4012 Webster St. Free. 301-864-0756.
Landover outdoor movie, watch Will Smith and Tommy Lee Jones in “Men in Black.” 7-10 p.m., Kentland-Columbia Park Community Center, 2411 Pinebrook Ave., Landover. Free. 301-386-2278.
Upper Marlboro astronomy event, the Astronomy Club of Southern Maryland hosts this event to observe star clusters and nebulae in the night sky using telescopes. 8-10 p.m., Merkle Wildlife Sanctuary, 11704 Fenno Rd., Upper Marlboro. Free, reservations required. 301-888-1410.
National Harbor “Imagination Playground,” for age 5 and younger, make castles, pirate ships and more out of foam blocks. 11 a.m-6 p.m. Saturday; for information about other times and days through Aug. 30, contact the National Children’s Museum, Launch Zone, 112 Waterfront St., National Harbor. Admission, free. 301-686-0225 or www.ncm.museum.
National Harbor “Imagination Playground,” for age 5 and younger, make castles, pirate ships and more out of foam blocks. Noon-4 p.m. Sunday, 11-4 Aug. 3 National Children’s Museum Launch Zone, 112 Waterfront St., National Harbor. Admission, free. 301-686-0225.
Berwyn Heights kayak lessons, for age 10 and older, learn basic skills from an instructor. Kayaks available to be borrowed for lesson. 9-11 a.m., Lake Artemesia Natural Area, Berwyn Road and Ballew Avenue, Berwyn Heights. $5; nonresidents of Prince George’s and Montgomery counties, $6. 301-627-7755.
Fort Washington family fun day, games, sports, entertainment and free food, hosted by Del. Jay Walker and the Maryland-National Capital Park and Planning Commission. 2-6 p.m., Tucker Road Community Center, 1771 Tucker Rd., Fort Washington. Free. 301-248-4404.
Brentwood call for artists, for age 18 and older, proposals and exhibit applications are being accepted from artists and curators interested in showcasing their work at the Exchange. To apply, submit a one-page artist statement, resume, CD or DVD containing 15-20 images or two to five segments of audio and/or video; include a self-addressed stamped envelope for return of materials. Submission deadline is Aug. 31. Brentwood Arts Exchange at Gateway Arts Center, 3901 Rhode Island Ave. Free. 301-277-2863; TTY 301-446-6802; arts.pgparks.com or email@example.com.
New Carrollton book talk, a librarian leads a discussion about Kwei Quartey’s “Children of the Street.” 6:30 p.m., New Carrollton Library, 7414 Riverdale Rd. Free. 301-459-6900.
Black history lecture, historian C.R. Gibbs discusses “The Paradox of Loyalty: Blacks and U.S. Armed Forces.” 7 p.m., Greenbelt Library, 11 Crescent Rd., Greenbelt. Free. 301-345-5800.
Cheltenham wetland tour, for age 2 and older, see wildlife. 7-9 p.m., Cheltenham Wetlands Park, 9020 Commo Rd. Free. 301-627-7755.
Computer basics, an introductory class for all ages. 9:10 a.m., Beltsville Library, 4319 Sellman Rd., Beltsville. Free, registration required. 301-937-0294.
Minority business seminar, learn how social media platforms (Web-based and mobile) can help engage customers and grow a business. 2-5 p.m., Largo Kettering Library, 9601 Capital Lane, Largo. Free, registration required. Denise Roberts, 301-883-6480, or www.princegeorgescountymd.gov/minoritybusiness.
Riverdale Park farmers market, 3-7 p.m. Thursdays, through Nov. 15, Queensbury Road, Riverdale Park. Admission, free. Jim Coleman, 301-586-5973, or www.rpfarmersmarket.org.
Fort Washington preschool open house, for parents and children ages 3-5, meet staff from Harmony Hall Preschool, tour classrooms and play area, and learn about the curriculum. 7-8 p.m., Harmony Hall Regional Center, 10701 Livingston Rd., Fort Washington. Free. 301-203-6070.
Baysox party, celebrate the last home game of the season as the Baysox take on the Erie SeaWolves. Admission includes a buffet and open bar at the Diamond View restaurant. Buffet, 6-8 p.m.; game, 7:05 p.m., Bowie Baysox, 4101 NE Crain Hwy., Bowie. $44; season ticket holders, $39. 301-653-6139 or www.baysox.com.
Mail: Community Calendar, Local Living, The Washington Post, 9500 Arena Dr., Suite 400, Largo, Md. 20774.
Details: Announcements are accepted on a space-available basis from public and nonprofit organizations only and must be submitted at least 14 days before the Thursday publication date. Include event name, dates, times, exact address, prices and a publishable contact phone number.