"Peanuts" comes alive this weekend in Virginia when the Reston Community Center kicks off its new season of fun, mime and magic with "You're a Good Man, Charlie Brown," a play featuring all the quirky characters from the famous cartoon strip.

Also Friday night, the Vienna Theater Company will present its rendition of "The Sound of Music."

The following events are free unless otherwise noted.

NATIONAL ZOO -- Open daily; gates open from 8 to 8; animal buildings, 9 to 6; panda feedings, 11 and 3; elephant training demonstrations, 2; Sea lion training demonstrations, 2, 3001 Connecticut Ave. NW (Rock Creek Park), on the Metro Red Line. Family learning centers Zoolab and Birdlab open Friday through Sunday, noon to 3; Herplab open Wednesday through Sunday, noon to 3. 673-4717.

OXON HILL FARM -- Open daily, 8:30 to 5, Oxon Hill Road (take Beltway exit 3A, turn right on Oxon Hill Road). Saturday and Sunday, 11 to 3, take a wagon ride and help the farmer harvest this winter's corn crop. 839-1177.

NATIONAL AQUARIUM -- Open daily, 9 to 5, Department of Commerce, 14th and Constitution Avenue NW. The sharks are fed Monday, Wednesday and Saturday at 2; weekday features are a touch-tank, mini- theater and a thousand types of marine life. School groups should schedule in advance. Adults $1; children 50 cents. 377-2825.

CEDAR HILL -- Open daily, 9 to 4, 1411 W St. SE, Anacostia. Cedar Hill, Frederick Douglass' home, recalls his work with films, interpretive exhibits and a house tour. 426- 5961 or 426-5962 or 426-5963.

USS BARRY -- Open daily, 10 to 5, Washington Navy Yard, Ninth and M streets SE. The Navy destroyer's weather deck is open for public viewing and self-guided tours. 433-3377.

CHILDREN'S MUSEUM -- Monday through Saturday, 10 to 4, Sunday 1 to 4, Rose Hill Children's Museum, north of Frederick. Take U.S. 15 north to Exit 8 to Motter Avenue; follow Motter to left onto 14th Street and left onto North Market Street; follow signs to Rose Hill. Costumed tour guides conduct tours of the 1790 mansion. Hands-on exhibits include a loom, antique toys and spinning wheel. Adults $1; under 17, free. 301/694- 1646.

CAPITAL CHILDREN'S MUSEUM -- Daily, 10 to 5, 800 Third St. NE. $2; special performances an additional $2. Saturday, 11:30 and 12:30; Sunday 12:30, listen to Kay White tell funny stories and sing funny songs; audience participation welcomed. 543-8600.

DOLL'S HOUSE AND TOY MUSEUM -- Tuesday through Saturday, 10 to 5; Sunday, noon to 5, 5236 44th St. NW. Antique dollhouses, dolls, toys, games and an exhibit of antique cat games and toys. Adults $2; under 14, $1; group rates available. 244-0024.

CLOISTERS CHILDREN'S MUSEUM -- Wednesday through Friday, 10 to 4:30; Saturday, 12 to 4, 10440 Falls Rd., Brooklandvie, Md., "Indian Summer Celebration." Hunt bear and porcupine hidden along a nature trail, dance around a totem pole, and see an extensive Kachina doll exhibit. Saturday, museum hours, "Indian Crafts": make tepees, sandpaintings and decorate indian headbands. $2 donation requested from adults; group tours available. 301/823-2551.

RAILROAD STATION MUSEUM -- Wednesday through Saturday, 11 to 4; Sunday, noon to 5, Main Street and Maryland Avenue, Ellicott City. The renovated station has a diorama of the trip of Tom Thumb (an early 19th-century train) from Baltimore to Ellicott City. There are also sight and sound shows, model train exhibits and tours of the museum. Adults $1.25; under 13, 75 cents. 301/461-1944.

COLONIAL FARM -- Wednesday through Sunday, 10 to 4:30, Claude Moore Colonial Farm at Turkey Run, 6310 Old Georgetown Pike, McLean. Take a self-guided tour of farm life for a low-income family in Colonial Virginia. Ongoing demonstrations of agricultural and domestic chores, such as spinning and candlemaking, round out this history lesson. Adults $1; children under 12, 50 cents. 703/442-7557.

CHILDREN'S STORY HOUR -- Friday, 3 to 4, Potomac Overlook Park Nature Center, 2845 Marcey Rd., off Military Road, Arlington. Naturalists tell stories for pre-schoolers and kindergarteners. 528-5406.

SOUND OF MUSIC -- Friday through Sunday, 8 p.m., matinee Sunday, 2:30, Vienna Community Center, 120 Cherry Street SE., Vienna (take the Beltway to the Vienna & Route 123 exit, take 123 to left on Park Street; Vienna Center is on the corner of Park and Cherry streets). A production of "The Sound of Music" geared for children and adults. Adults $6 in advance, $7 at door; seniors and kids under 12, $5 in advance, $6 at door. 938-8000, ext. 277.

CHILDREN'S RADIO THEATER -- Saturday, 8 a.m., WPFW 89.3 FM. "Life in the 21st Century," a glimpse into the world of tomorrow as seen through the eyes of children. Listeners can participate in a call-in following the program by calling 783-3104.

SATURDAY MORNING AT THE NATIONAL -- Saturday, 9:30 and 11, Helen Hayes Gallery, National Theater. The Nubian Theater Company portrays African culture through dance, music and storytelling. Reservations recommended. Call 783-3372, 24 hours a day.

CHILD SAFETY DAY -- Saturday, 10 to 4, Falls Church Communuty Center, 223 Little Falls Street, Falls Church. McGruff the crime dog will be on the scene when parents and volunteers help put together identification packages for kids that will include vital statistics, photographs and fingerprint records; special appearances throughout the day. 532-7334.

MERCHANT DAY -- Saturday, 10 to 4, Carlyle House, 121 N. Fairfax Street, Alexandria. Kids will get the chance to make rope as well as design their own merchant mark; the captain and crew of the sailing ship Alexandria will be on hand. Adults $2; kids over six, $1.50. 549-2997.

CHILDREN'S STORIES -- Saturday, 11 a.m., The Cheshire Cat Book Store, 5512 Connecticut Ave. NW. Kids four and older can enjoy an hour of fun storytelling. 244-3956.

SATURDAY AFTERNOON AT THE CENTER -- Friday, 8 p.m.; Saturday, 3 p.m. and 8 p.m.; Sunday, 3 p.m., Reston Community Center, 2310 Colts Rd., Reston (take the Beltway to the Dulles Toll Road (267), to Reston Avenue and follow signs to the center). The Peanuts play "You're a Good Man, Charlie Brown" kicks off a season of mime, magic, mystery, musical merriment and fun for kids of all ages. Adults $5; students and seniors $3. Charge tickets at

TROLLEY MUSEUM -- Saturday and Sunday, noon to 5, Northwest Branch Regional Park, Bonifant Road between Layhill Road and New Hampshire Avenue, north of Wheaton. Trolley rides: $1 adults; under 18, 75 cents; under two, free. 384-9797.

CHILDREN'S PLANETARIUM -- Saturday and Sunday, 1 and 4, Rock Creek Nature Center, 5200 Glover Rd. NW. First show for children four to seven (must be accompanied by an adult); second show for ages seven and up. No latecomers are admitted. 426-6829.

BLUE SKY PUPPETS -- Sunday, 2, Rock Creek Nature Center, 5200 Glover Rd. NW, "Lights Out on the Bunny Brothers." A 45- minute presentation featuring singalong, music, puppet show and other entertainment relying on audience participation. 426-6829.

CHILDREN'S PARTY -- Sunday, 3:30 to dusk, St. Margaret's Episcopal Church, 1820 Connecticut Ave. NW. Children of all ages are invited to spend the afternoon with a clown, watching a puppet show and enjoying punch, cookies and balloons. 234-6664.