What's Doing

DESIGNERS' SHOWCASE -- Tour two dozen small rooms redecorated by local interior designers, Friday 10 to 3 and 6:30 to 9, Saturday 10 to 5, Sunday 1 to 5. $20. Center for Family Development, 7007 Bradley Blvd., Bethesda. 301-365-0612.

"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.

"BALTICON 38" -- From Friday at 4 through Monday at 4, a science fiction and fantasy convention with panel discussions, readings, concerts, movies, contests, art show, exhibits, vendor sales and other activities. $52 at the door. Sponsored by the Baltimore Science Fiction Society at the Wyndham Inner Harbor, 101 W. Fayette St., Baltimore. 410-563-2737.

USED BOOK SALE -- Saturday 8 to noon. Rotary Books for International Goodwill, 3106 Solomon's Island Rd., Parole. 410-293-6865.

HOME AND DESIGN SHOW -- Saturday and Sunday 10 to 6. Displays and presentations by more than 100 designers, artisans and vendors. $10. Ritz-Carlton Tysons Corner, 1700 Tyson's Blvd., McLean. 301-622-5107.

VIRGINIA RENAISSANCE FAIRE -- Open Saturday through Monday 10 to 6, and weekends through June 13. Entertainment, crafts, exhibits, living history portrayals, children's activities. $12, seniors and ages 5 to 15 $7, younger free. Lake Anna Winery, 5621 Courthouse Rd., Spotsylvania. 703-508-5036.

HALFWAY PARK DAYS -- Saturday 10 to 7, Sunday 11 to 5. Entertainment, crafts fair, food vendors. Martin L. Snook Memorial Park, Halfway Boulevard and Virginia Avenue, Hagerstown. 301-733-0877.

MEMORIAL DAY CEREMONY -- Saturday at 11, a wreath-laying ceremony followed by a parade. Antietam National Battlefield, Route 65, Sharpsburg. 301-432-5124.

MEMORIAL DAY PARADE -- Saturday at noon, along Belair Drive, Sussex Lane, Stoneybrook Drive and Sage Lane past Bowie Community Center to Market Place Shopping Center. 301-809-3078.

"PARADE SALUTE TO World War II Veterans" -- Monday starting at 8 a.m., units from American Legion and VFW chapters and other organizations pass Third Street and Independence Avenue SW. 202-777-7272.

HERNDON FESTIVAL -- Thursday 6 to 9:30, and through June 6. Entertainment on two stages, carnival rides, food vendors; fireworks at 9:30. Town Hall Square, 777 Lynn St., Herndon. 703-435-6800.