"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.
U.S. MARINE CORPS "EVENING Parade" -- Fridays at 8:45 through Aug. 27, the Marine Band, Drum & Bugle Corps, Silent Drill Platoon and marching units stage a colorful full-dress parade. Free, but reservations are required and must be requested in writing. At the Marine Barracks, Eighth and I streets SE. For mailing instructions, call 202-433-6060.
RUMMAGE SALE -- Saturday 9 to 4. Roosevelt Center, Crescent Road and Southway, Greenbelt. 301-910-0050.
MODEL TRAIN SHOW -- Saturday and Sunday 10 to 4. Operating layouts, vendor tables. $7, under 12 free. Maryland State Fairgrounds, York Road at I-83, Timonium. 630-279-4087.
NASA COMMUNITY DAY -- Saturday 10 to 6, tour buildings and see exhibits and demonstrations at the Goddard Space Flight Center in Greenbelt, including the Hubble Space Telescope Control Center, rocket and robotics demonstrations, and testing facilities. Free parking at designated lots on Route 193 with free shuttles to 13 tour stops; free shuttles from Greenbelt Metro station. Photo identification required for everyone 16 and older. All persons and belongings subject to search. 301-286-6397.
"BALTIMORE MEGAFEST" -- Saturday 10:30 to 5, Sunday 10:30 to 4, a comic book, toy, TV and movie convention. Vendor sales, exhibits, celebrity autograph sessions. Scheduled celebrities include actors Adam West, Julie Newmar, Lee Meriwether, Julie Benz and Joanna Cameron, and comic artists Steranko, Mark Wheatley, Marc Hampel and Harry Roland. $16, under age 12 $6. Sheraton Baltimore North Hotel, 903 Dulaney Valley Rd., Towson. 201-261-4982.
CIVIL WAR ENCAMPMENT -- Saturday 11 to 5, Sunday 11 to 3, living history portrayals of medical and relief services by the 20th Maine Living History Volunteer Group. Harpers Ferry National Historical Park, U.S. 340, Harpers Ferry, W. Va. 304-535-6029.
PEACH FESTIVAL -- Saturday noon to 5. Bake sale, crafts fair, flea market, dinner. Eastport United Methodist Church, 926 Bay Ridge Ave., Annapolis. 410-263-5490.
INTERNATIONAL CULTURAL FESTIVAL -- Saturday 4 to 7. Entertainment, folk dancing, martial arts demonstrations. Sponsored by Culture to Culture International USA Inc. at the Jefferson Memorial. 301-721-2861.
"SCREEN ON THE GREEN" -- Monday at dusk, the 1962 suspense film "Whatever Happened to Baby Jane?" will be shown on a large outdoor screen. Free. On the Mall between Fourth and Seventh streets NW. 877-262-5866.
U.S. MARINE CORPS "SUNSET Parade" -- Tuesday at 7 (and at 6:30 Aug. 10 and Aug. 17), the Marine Drum & Bugle Corps, Silent Drill Team and marching units stage a colorful full-dress parade. Free. At the Marine Corps War Memorial (Iwo Jima Memorial), on U.S. 50 next to Arlington National Cemetery. 202-433-6060.