What's Doing

BSO DECORATORS' SHOW HOUSE -- Tour the 29-room Guillford House, redecorated by 30 local designers, through May 23 in this annual benefit for the Baltimore Symphony Orchestra. Open Fridays and Saturdays 10 to 4, Sundays 1 to 4, Tuesdays and Thursdays 10 to 8, Wednesdays 10 to 4. $15 in advance, $20 at door. Parking with shuttles at Church of the Redeemer, 5603 N. Charles St., Baltimore. 410-783-8000.

"WINGS OF FANCY" -- Watch live butterflies fly freely in a colorful garden. Open daily 10 to 4, through Sept. 19. $4, ages 3 to 12 $3. No strollers permitted. Brookside Gardens, 1800 Glenallan Ave., Wheaton. 301-962-1400.

DESIGNERS' SHOWCASE -- Tour two dozen small rooms redecorated by local interior designers, through May 30. Open Fridays 10 to 3, Saturdays 10 to 5, Sundays 1 to 5, Tuesdays-Thursdays 10 to 3, and Thursdays and Fridays 6:30 to 9. $20. Center for Family Development, 7007 Bradley Blvd., Bethesda. 301-365-0612.

MONSTER TRUCK and Motocross Show, Friday and Saturday at 7; gates open at 3. General admission $25, children/youths $15; reserved seats $35. Old Dominion Speedway, 10611 Dumfries Rd., Manassas. 703-361-7753.

PREAKNESS STAKES -- Saturday, the 129th running of the middle jewel in the Triple Crown: gates open at 8 a.m., first race at 10:30, Preakness at 6:05. Most seating sold out; infield $42. Pimlico Race Course, 5201 Park Heights Ave., Baltimore. 410-542-9400.

FLEA MARKET -- Saturday 9 to 1. Glenn Dale Fire Association, 11900 Glenn Dale Blvd., Glenn Dale. 301-853-6723.

RUMMAGE SALE -- Saturday 9 to 2. Sponsored by Glen Forest Community Association at Glencarlyn Road Baptist Church, 3245 Glen Carlyn Rd., Falls Church. 703-931-1480.

CRAFTS FAIR AND FLEA MARKET -- Saturday 9 to 2. Glenn Dale United Methodist Church, Good Luck and Springfield roads, Glenn Dale. 301-249-4330.

NATIVE PLANT SALE -- Saturday 9 to 3. Sponsored by the Virginia Native Plant Society at Gree Spring Gardens Park, 4601 Green Spring Rd., Alexandria. 703-534-8179 or 703-920-1913.

DAYLILY PLANT SALE -- Saturday 9 to 5. Sponsored by the Natinal Capital Daylily Club at Greenspring Gardens Park, 4603 Greenspring Rd., Alexandria. 703-360-1989.

SPRING FESTIVAL -- Saturday 9:30 to 2. Baked goods, crafts, jewelry, plants. National Lutheran Home for the Aged, 9701 Veirs Dr., Rockville. 301-424-9560.

BENEFIT POTTERY & CRAFT FAIR -- Saturday and Sunday 10 to 3. Sponsored by Potters for Peace and the Nicaraguan Cultural Alliance at Quixote Center, 3502 Varnum St., Brentwood.

301-864-5218.

ANTIQUE CADILLAC SHOW -- Sunday 10 to 3. About 80 antique and classic Cadillacs and LaSalles. Capitol Cadillac, 6500 Capitol Dr., Greenbelt. 703-368-2367.

LOUDOUN FARM TOUR -- Saturday and Sunday 10 to 4, self-guided tour of working farms in Loudoun County. Obtain brochure and map at Loudoun Convention and Visitors Association, 222 Catoctin Circle, Leesburg. 703-777-0426.

ANTIQUE AND COLLECTIBLE SHOW -- Saturday 10 to 5, Sunday 10 to 4. About 200 booths of furniture, porcelains, silver, jewelry, memorabilia etc. $5. Montgomery County Fairgrounds, Route 355 and Mannakee Street, Rockville. 301-216-0876.

18TH-CENTURY MARKET FAIR -- Saturday and Sunday 11 to 4:30. Demonstrations of spinning, furniture making and other 18th-century crafts and skills; entertainment; vendor sales; refreshments. $5, ages 3 to 12 $2.50. Claude Moore Colonial Farm, 6310 Georgetown Pike, McLean. 703-847-0710.

"WINDS AND WINE FESTIVAL" -- Saturday and Sunday 11 to 5. Model airplane and sailboat demonstrations, entertainment, crafts fair, wines. $12, ages 6 through 20 and designated drivers $8, younger free. Tarara Winery, 13648 Tarara Lane, Leesburg. 703-771-7100.

"McLEAN DAY 2004" -- Saturday 11 to 5. Entertainment, crafts fair, carnival rides, exhibits, model airplane air show, food vendors. Sponsored by McLean Community Center, at 1659 Chain Bridge Rd., McLean. 703-790-0123.

LITHUANIAN FESTIVAL -- Saturday and Sunday 11 to 6. $2. Traditional music, crafts, foods. Catonsville Armory, 130 Mellor Ave., Catonsville. 410-646-0261.

ARLINGTON HOME TOUR -- Saturday noon to 4, visit 10 renovated houses in North Arlington. $20; purchase tickets at Tuckahoe School, 6550 N. 26th St., Arlington. 703-237-7907 or 703-237-2111.

BENEFIT FASHION SHOW -- Saturday at noon, for Jamaican outreach programs. Zion Baptist Church, 4850 Blagden Ave. NW. 202-745-3522.

COLONIAL MILITARY and civilian living history portrayals, Saturday noon to 5, Sunday 11:30 to 4:30. St. Barnabas' Episcopal Church, 14111 Oak Grove Rd., Upper Marlboro. 301-249-5000.

ARMENIAN FESTIVAL -- Saturday noon to 6. Traditional music, dancing, crafts, foods. Market Square, 301 King St., Alexandria. 703-883-4686.

BENEFIT AUCTION OF travel packages, Saturday at 7, with dinner and music. $60. Sponsored by the International Ecotourism Society at the Organization of American States, 17th and Constitution NW. 202-347-9203.

BENEFIT WINE-TASTING -- Saturday at 7:30, for Round House Theatre education and outreach programs. $200. Embassy of New Zealand, 37 Observatory Circle NW. 240-644-1405.

PLANT SALE -- Sunday 9:30 to 2:30, by the Azalea Society of America. Brookside Gardens, 1800 Glenallan Ave., Wheaton. 301-933-2339.

DOLLHOUSE MINIATURES SHOW -- Sunday 11 to 4. $5, ages 12 and under $3. Westpark Hotel, 8401 Westpark Dr., McLean. 703-978-5353.

"MOOVIN' THE BIG LOG" -- Sunday 11 to 4, teams of working oxen and their drovers demonstrate their skills. Piney Run Park, Route 26 and Route 32, near Sykesville. 410-795-6043.

BOWIE HERITAGE DAY -- Sunday noon to 4. Entertainment, pony rides, antique car show, petting zoo. Belair Mansion, 12207 Tulip Grove Dr., and Belair Stable, 2835 Belair Dr. 301-809-3089.

HIGH SCHOOL ARTS FESTIVAL -- Wednesday and Thursday 7 to 10. Performances by instrumental, choral and theatrical groups; visual arts, photography and ceramics exhibits. Walt Whitman High School, 7100 Whittier Blvd., Bethesda. 301-320-6600.

"ZOOFARI" -- Thursday at 6:30, benefit gala for the National Zoo, with entertainment, delicacies by local chefs, wine, animal demonstrations. $135 per person. National Zoo, 3001 Connecticut Ave. NW. 202-673-4613.