CAPITAL CHILDREN'S MUSEUM -- Daily, 10 to 5, 800 Third St. NE. Friday, 10:15; Saturday and Sunday, 1 and 2:30, "Hansel and Gretel." A one-man puppet production adapted from Humperdinck's children's opera. Saturday-Sunday, museum hours, make a turkey out of paper bags, newspaper and crayons. $2; special performances 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, a farm staff member shows colonial toys. Adults $1; children under 12, free. 301/283-2113.

DISCOVERY THEATER -- Tuesday-Friday, 10 and 11:30 a.m.; Saturday, 1 and 3, Discovery Theater, 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 to 6. Adults $3; 12 and under, $2.50; group rates available. For more information and reservations, call 357-1500.

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. Demonstrations of agricultural and domestic chores, such as spinning and candlemaking, will round out this history lesson. Adults $1; children under 12, 50 cents. 703/442-7557.

WIZARD OF OZ -- Friday, 8; Saturday, 10 and 2, Frost Intermediate School, 4101 Pickett Rd., Fairfax. The 30th annual fully- staged production of this classic children's tale. $2. 703/978-3088.

CHILDREN'S FILMS -- Saturday, 10:30, Alexandria Library, 717 Queen St., Alexandria. Three films: "Miss Nelson is Missing," "The Foolish Frog" and "Zoo." 838-4555.

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.

CHILDREN'S RADIO THEATER -- Saturday, 8 a.m., WPFW 89.3 FM. "Just So Stories," Part II of Kipling's classic tales. Listeners can paricipate 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. Grey Seal Productions presents "Turkey in Trouble," about a turkey's escape from the Thanksgiving platter. Reservations recommended. Call 783-3372, 24 hours a day.

DISCOVER THE GALLERY -- Saturday, 10 to 11:30, National Gallery of Art, Fourth and Constitution Avenue NW, "The Christmas Story." A program for families with children ages six to 12. See the film, "The Adoration of the Magi," based on an Italian painting by two Renaissance monks; a tour of Christmas paintings follows. Free, but advance registration required. 842-6249

WOLF TRAP -- Saturday, 11 and 1, The Barns, 1624 Trap Rd., Vienna. Folksinger John McCutcheon demonstrates instruments, spins yarns and leads singalongs in this special children's program. $4. 938-2404.

OLD POST OFFICE -- Saturday, noon to 1, Pavilion, 1100 Pennsylvania Ave. NW. Sara Ewing performs mime for children. 289-4224.

ADVENTURE THEATER -- Saturday and Sunday, 1:30 and 3:30, Adventure Theater, Glen Echo Park, Glen Echo. "Heidi," an orphan girl leaves her home in the Alps for the big city. $4, group rates available. 320- 5331 weekdays and performance days from 10 to 2.

TURKEY MADNESS -- Saturday, 1:30 to 4:30, Prince George's Plaza Community Center, 6600 Adelphi Rd., Hyattsville. Free- throw contest for a turkey prize, rollerskating, crafts, relays and games for kids K through 6. $2. Limited to first 100 kids; proceeds go to United Way. 864-1611.

FAMILY FILMS -- Saturday, 1:30, Twinbrook Library, Veirs Mill Road, Rockville. Stories and filmstrips about apples. 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 -- Sunday, Jewish Community Center, 6125 Montrose Rd., Rockville. Children sell used toys, books, games, records for children. 881-0100.