Compare your athletic skills with those of zoo animals this Sunday afternoon at the National Zoo's Olympic Games. At about 10 stations around the zoo, you can shout, hold your breath, jump, run and even try to stand on one leg longer than a flamingo. All participants receive a certificate of particpation.

The program also features two performances by the Echo Mime Company and several showings of the film, "Animal Olympians." Meet at the Zoo Education Building at 1. For times of specific events, call 673-4717.

All events are free unless otherwise noted.

NATIONAL ZOO -- Saturday, noon to 4, "Zoo Olympics." Test your athletic skills against record holders from the animal world. Watch the Echo Mime Company make animal moves and see the film, "Animal Olympians." Open daily; gates open 8 to 6; animal buildings, 9 to 4:30. Elephant training demonstrations, 2; sea lion training demonstrations, 11:30. Panda Hsing-Hsing is fed outdoors at 11, weather permitting; Panda Ling-Ling stays inside the Panda House, closed in hopes she is pregnant. 3001 Connecticut Ave. NW (Rock Creek Park), on the Metro Red Line. Family learning centers Zoolab and Birdlab open Friday-Sunday, noon to 3; Herplab open Wednesday- Sunday, noon to 3. 673-4717.

CAPITAL CHILDREN'S MUSEUM -- Daily, 10 to 5, 800 Third St. NE. "Hansel and Gretel," a one-man puppet production adapted from Humperdinck's children's opera: Friday, 10:15; Saturday and Sunday, 1 and 2:30. Saturday- Sunday, museum hours, trace a shield in a writing hall and fill it with medieval symbols and emblems of your choice. Museum admission, $2; puppet show, an additional $2.50. 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.

NATIONAL COLONIAL FARM -- Tuesday through Sunday, 10 to 5, 3400 Bryan Point Rd., Accokeek. Sunday, 1 to 4, learn how to stuff a turkey the traditional colonial way. Adults $1; children under 12, free. 301/283-2113.

DISCOVERY THEATER -- Tuesday-Friday, 10 and 11:30 a.m.; Saturday, 1 and 3, Arts and Industries Building, 900 Jefferson Dr. SW. Classic Stories, Enduring Tales: "Dancers of the Third Age," dance excerpts from Homer's Odyssey about the hero Ulysses. Recommended for children in grades 2-6. Adults $3; 12 and under, $2.50; group rates available. For more information and reservations, call 357-1500.

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.

INTERNATIONAL NIGHT -- Friday, 6:30, Alice Deal Junior High School, Nebraska Avenue and Fort Drive NW. A family evening of student talent performances, international foods and a money tree. Adults $2; children $1. 282-0100.

MAGIC SHOW -- Friday, 7:30 to 8:30; Saturday, 3 to 4, Great Falls Grange, 9818 Georgetown Pike, Great Falls, Va. Magician Len Dileo performs for children 14 and under; audience participation encouraged. $3 per person; advance purchase of tickets recommended. 759-6037.

CHILDREN'S RADIO THEATER -- Saturday, 8 a.m., WPFW 89.3 FM. "Just So Stories, Part I," armadillos and camels star in this Kipling tale. Listeners can participate in a call-in following each program by calling 783-3104.

SATURDAY MORNING AT THE NATIONAL -- Saturday, 9:30 and 11, Helen Hayes Gallery, National Theater. Barnett Williams, of the D.C. Percussion Society, demonstrates a medley of percussion instruments from around the world and shows audience volunteers how to play them. Free, but reservations recommended. Call 783- 3372, 24 hours a day.

KENNEDY CENTER -- Saturday, 10:30 and 12:30, Theater Lab, John F. Kennedy Center for the Performing Arts, "Mother Hicks." A play about a lonely orphan girl, a solitary old woman and a deaf-mute trying to make it through the Great Depression; recommended for children nine through 13. Call 254-3600.

DISCOVER THE GALLERY -- Saturday, 10 to 11:30, National Gallery of Art, Fourth and Constitution Avenue NW, "Objects Fit for a King." A program for families with children ages six to 12. Docents from the Folger Library will dress a child from the audience in English costume and describe it. Then take a museum tour of decorative arts and furniture from the Renaissance. Free, but advance registration required. 842-6249

THE WIZARD OF OZ -- Saturday, 11, Ellen Coolidge Burke Branch Library, 4701 Seminary Rd., Alexandria. The original film starring Judy Garland. 838-4598.

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, "Comets: Omens or Dirty Snowballs?," for ages seven and up. No latecomers admitted. 426-6829.

FAMILY FILMS -- Saturday, 1:30, Twinbrook Library, Veirs Mill Road, Rockville. "The Cricket in Times Square" and "The Red Balloon." 279-1980.

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 FLEA MARKET -- Saturday, 2 to 4, McLean Community Center, 1236 Ingleside Ave., McLean. 45 merchants, 13 years old and under, sell their stuff from their closets and toy boxes. 821-0782.

SCULPTURE FOR CHILDREN -- Saturday, 3 to 5, The Athenaeum, 201 Price St., Alexandria. A workshop where kids five through 12 can do assemblage and construction with wood, inspired by viewing the gallery's current exhibit. $3. Reservations recommended. 548-0035.

BEAR JAMBOREE -- Saturday, 3:30, Ellen Coolidge Burke Branch Library, 4701 Seminary Rd., Alexandria. Stories, songs, games and movies for kids three and up. Everyone must bring one stuffed bear. Reservations recommended. 838-4598.

HALLEY'S COMET WATCH -- Saturday, 7 to 8 p.m., Burke Lake Park, train station parking lot, 7315 Ox Road (Rte. 123), Fairfax Station, Va. Bring binoculars for a look at the famous comet; members of the National Air and Space Museum and National Capital Astronomers will be on hand to share their telescopes and help you find the comet. 451-9588.

FAMILY SKATE NIGHT -- Sunday, 7:30, Tucker Road Ice Rink, 1771 Tucker Rd., Fort Washington, Md. A family of four can skate for $2.50; skate rental is an additonal $1.50 per person. 248-3124.