What's Doing

LIVE BUTTERFLY SHOW -- Open daily from 10 to 4, through Sept. 18. Butterflies fly freely in an indoor garden of nectar plants. $4.50, ages 3 to 12 $3.50. Brookside Gardens, 1800 Glenallan Ave., Wheaton. 301-962-1400.

RUMMAGE SALE -- Friday and Saturday 9 to 1. Claude Moore Colonial Farm, 6310 Georgetown Pike, McLean. 703-442-7557.

FLEA MARKET -- Saturday 9 to 2. College Park United Methodist Church, 9601 Rhode Island Ave., College Park. 301-474-7874.

"NANTUCKET ON THE SEVERN" -- Designer show house, open Friday and Saturday 10 to 5, Sunday noon to 5. Tour the waterfront property redecorated by 11 interior designers. $20, for the Anne Arundel Medical Center DeCesaris Cancer Institute and the Hospice of Chesapeake. 517 Scrimshaw Lane, Severna Park. 443-336-0873 or 410-279-4088.

AFRICAN AMERICAN HERITAGE Festival -- Friday 1 to 10, Saturday 10 to 10, Sunday 10 to 7. Entertainment, exhibits, food vendors. Oriole Park at Camden Yards, 333 W. Camden St., Baltimore. 410-318-8286.

BEER FESTIVAL -- Friday 5 to 11, Saturday noon to 11, Sunday noon to 7. Sample products of more than 50 breweries, with music by Last Train Home, the Crawdaddies, Gonzo's Nose and other local bands, food vendors, crafts displays, children's activities. $12, under 16 free. Old Dominion Brewing Company, 44633 Guilford Dr., Ashburn. 703-724-9100.

MODEL AIRPLANE MEET -- Saturday 7:30 a.m. to dark. Demonstrations of radio-controlled model airplanes. Sponsored by Free State AeroModelers at Konterra Model Air Park, Van Dusen Avenue off Route 198, Laurel. 240-264-4842.

FLEA MARKET -- Saturday 8 to 3. Sponsored by the Community Health Partnership at Nativity Church, 13th and Peabody NW. 31-565-0040.

SCALE MODEL TRAIN SHOW -- Saturday 9 to 4, Sunday 11 to 4. Operating layouts, films, clinics, about 500 dealer tables. $7, under 12 free; family $14. Maryland State Fairground, York Road at I-83, Timonium. 410-730-1036.

CUSTOM CAR SHOW -- Saturday 5 p.m. to midnight. Entertainment, exhibits, video game festival, motorcycle rider demonstrations, dance club. $25. "XM Satellite Radio Hot Import Nights" tour at Dulles Expo Center, Willard Road off Route 28, Chantilly. 703-378-0910.

ARGENTINA NATIONAL DAY Celebration -- Saturday 6 to 10:30 p.m. Entertainment by Los 4 de Cordoba, Nito Metre and others, crafts displays, food vendors. $20, seniors and students $15. Thomas Jefferson Theater, 125 S. Old Glebe Rd., Arlington. 703-212-5850.

ANTIQUES AND COLLECTIBLES FAIR -- Sunday 9 to 3. $3, under 12 free. Howard County Fairgrounds, 2210 Fairgrounds Rd., West Friendship. 443-506-5205.

"MEN CAN COOK TOO" -- Sunday 2 to 7. Sample foods prepared by area politicians and community leaders. $10, ages under 10 $5. Sponsored by the NAACP to benefit youth programs. Upper County Community Center, 8201 Emory Grove Rd., Gaithersburg. 301-657-2062.

"SUNSET PARADE" -- Tuesdays at 7, through Aug. 16. The Marine Drum & Bugle Corps, Silent Drill Team and marching units stage a colorful full-dress parade at the U.S. Marine Corps War Memorial (Iwo Jima Memorial), on U.S. 50 adjacent to Arlington National Cemetery. 202-433-6060.

"TWILIGHT TATTOO" -- Wednesdays at 7, through June 29. A military pageant and drills by the U.S. Army Third Infantry, Fife & Drum Corps, Drill Team and Army Band musicians. On the Ellipse, south of the White House. Free. 202-685-4989.