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Performances

"THE WIZARD OF OZ" by the Puppet Co., through July 18. Friday at 10 and 11:30; Saturday and Sunday at 11:30 and 1; Wednesday-Thursday at 10 and 11:30. $6. Reservations recommended. The Puppet Co. Playhouse, Glen Echo Park, 7300 MacArthur Blvd., Glen Echo. 301-320-6668.

"THE NEARSIGHTED KNIGHT and the Far Sighted Dragon," through July 11. Saturday and Sunday at 1:30 and 3:30. $7. Reservations recommended. Adventure Theatre, Glen Echo Park, 7300 MacArthur Blvd., Glen Echo. 301-320-5331.

UNIVERSOUL CIRCUS -- through June 20. Friday at 10:30 and 7:30; Saturday at noon, 4:30 and 8; Sunday 1, 4 and 7; Tuesday-Thursday 10:30 and 7:30. $10 on weekday mornings, $17.50 to $29 at other times, from Ticketmaster. Under the big top at Capital Plaza Mall, 6200 Annapolis Rd., Landover. To order, 202-397-7328 (service charges added); for information, 800-316-7439.

"SNOW WHITE & THE SEVEN Dwarfs" by the Children's Theatre, Friday at 7:30, Saturday at 3 and 7:30, Sunday at 3. $10, students, seniors and children $7. Reservations recommended. Thomas Jefferson Community Theatre, 125 S. Old Glebe Rd., Arlington. 703-548-1154.

BOB BROWN PUPPETS -- Saturday at 10. Lake Fairfax Park, 1400 Lake Fairfax Dr., Reston. 703-471-5415 or 703-324-8680.

FAIRFAX SYMPHONY STRINGS -- Saturday at 10. Burke Lake Park, 7315 Ox Rd., Fairfax Station. 703-323-6601 or 703-324-8680.

THE GOODLIFE THEATER -- Saturday at 10. Ellanor C. Lawrence Park, 5040 Walney Rd., Centreville. 703-631-0013

FAIRFAX SYMPHONY WOODWINDS -- Saturday at 10. Mason District Park, Newton W. Edwards Amphitheater, 6621 Columbia Pike, Annandale. 703-941-1730 or 703-324-8680.

"THE ELEVENTH FINGER" -- a puppet mystery story, Saturday at 10:30. $7, ages 8 and under $5. Old Town Theater, 815 1/2 King St., Alexandria. 703-683-8888.

"SLEEPING BEAUTY" -- through June 26. Saturday at 2. $9, show only. Reservations recommended. West End Dinner Theatre, 4615 Duke St., Alexandria. 703-370-2500.

"BILL WELLINGTON'S RADIO WOOF!" -- music and comedy, Monday at 10:30. City Hall Concert Pavilion, 27 S. Summit Ave., Gaithersburg. 301-258-6350.

Special Events

"IMAGINASIA" -- Saturday and Sunday at 2. Art tour and workshop for ages 6 to 14. Arthur M. Sackler Gallery, 1050 Independence Ave. SW. 202-357-2700 (TDD: 202-357-1729).

Nature

NATIONAL ZOO -- Grounds open daily 6 a.m. to 6 p.m., most animal buildings and Amazonia open 10 to 4:30 (exceptions are posted). Seal and sea lion training at 11:30, elephant care sessions at 11 most days. 3001 Connecticut Ave. NW. 202-673-4800.

NATIONAL AQUARIUM -- More than 1,000 specimens of aquatic life, including an alligator exhibit. Open daily 9 to 5. Adults $3, ages 2 to 10 75 cents, under 2 free. Department of Commerce Building, 14th and Constitution NW. 202-482-2825.

BALTIMORE AQUARIUM -- The National Aquarium in Baltimore features a marine mammal pavilion, an Atlantic coral reef exhibit and a South American rain forest. Timed-entry tickets required. Open Friday 9 to 8, Saturday-Thursday 9 to 5. Admission $17.50; seniors $14.50; ages 3 to 11 $9.50 (under 3 free). Pier 3, 501 E. Pratt St., Baltimore. For information, 410-576-3800; for advance tickets, Ticketmaster, 202-432-7328 or 410-481-7328 (service charges added).

NATIONAL WILDLIFE VISITOR Center -- Interior Department science and environmental education center offers interactive exhibits and films. Open daily 10 to 5:30. Patuxent Research Refuge, 10901 Scarlet Tanager Loop, Laurel. 301-497-5760.

ROCK CREEK NATURE CENTER -- Planetarium shows: "The Night Sky," Saturday and Sunday at 1 for ages 4 and up; "Exploring the Universe," Saturday and Sunday at 4 for ages 7 and up; planetarium show for younger children, Wednesday at 4 for ages 2 to 10. Free planetarium tickets distributed 30 minutes before each show. 5200 Glover Rd. NW. 202-895-6070.

ARLINGTON PLANETARIUM -- "Larry, Cat in Space," through June 20. Friday at 7:30, Saturday at 7:30, Sunday at 1:30 and 3. $2.50, seniors and ages under 12 $1.50. Reservations recommended. 1426 N. Quincy St., Arlington. 703-228-6070.

Places to Visit

CAPITAL CHILDREN'S MUSEUM -- Exhibitions: "Brain Teasers"; "Japan: Through the Eyes of a Child"; "Chemical Science Center"; "Mexico"; "Animation"; "Cityscapes." Open Tuesday through Sunday 10 to 5. $7, seniors $5, ages 2 and under free. 800 Third St. NE. 202-675-4120.

MARYLAND SCIENCE CENTER -- Exhibits: "Dino Digs," about dinosaurs native to Maryland; "Chesapeake Bay"; "Outer Space Place." Hands-on exhibits and demonstrations of scientific principles. IMAX films screened hourly. Planetarium show, hourly. Admission, including planetarium show and IMAX, is $16, seniors $14, ages 3 to 12 $12.50. Open Friday 10 to 5, Saturday 10 to 6, Sunday noon to 5, Monday-Thursday 10 to 5. 601 Light St., Baltimore. 410-685-5225.

PORT DISCOVERY -- Interactive fantasy structures, mechanical sculptures and related activities. Open Friday-Saturday 10 to 5, Sunday noon to 5, Tuesday-Thursday 10 to 5. $11, ages 3 to 12 $8.50, under 3 free. 35 Market Pl., Baltimore. 410-727-8120.

DISCOVERY CREEK CHILDREN'S Museum -- "Rotten But Not Forgotten," exhibit and related activities, through May 23. Open Saturday and Sunday 10 to 3. $5, seniors $3, under age 2 free. Glen Echo Park, 7300 MacArthur Blvd., Glen Echo. 202-337-5111.

LEESBURG ANIMAL PARK -- Petting zoo and related activities, open Friday-Sunday 10 to 5, Thursday 10 to 3. $7.95, seniors and ages 2 through 12 $5.95, younger free. 19270 James Monroe Highway, Leesburg. 703-433-0002.

CATHEDRAL CRAFTS -- Saturday 10 to 2, for ages 6 to 12. Explore mosaics, stained glass, stone carving and crafts. $7; reservations required for groups larger than ten. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-2934.

CLAUDE MOORE COLONIAL FARM -- Visit a re-creation of an 18th-century family farm, open Friday-Sunday and Wednesday-Thursday from 10 to 4:30. $3, seniors and ages 3 to 12 $2. 6310 Georgetown Pike, McLean. 703-847-0710.

NATIONAL COLONIAL FARM -- The mid- 18th-century tobacco plantation is open Friday-Sunday and Tuesday-Thursday from 10 to 5. Adults $2, under 12 50 cents; $5 maximum per family. 3400 Bryan Point Rd., Accokeek. 301-283-2113.

OXON HILL FARM -- The working farm is open daily from 9 to 4:30, with farm demonstrations and tours. Oxon Cove Park, 6411 Oxon Hill Rd., Oxon Hill. 301-839-1176 (TDD: 301-839-1783).

COLVIN RUN MILL -- Tour the 19th-century gristmill 11 to 5 daily except Tuesday. Adults $4, children $2. 10017 Colvin Run Rd., Great Falls. 703-759-2771.

OLD STONE HOUSE -- Tour the 1765 structure Friday-Sunday and Wednesday-Thursday noon to 5. 3051 M St. NW. 202-426-6851.

SULLY HISTORIC SITE -- The restored 1794 mansion, furnished with Federal-period antiques, is open from 11 to 4 daily except Tuesday. Hourly guided tours $5, students $4, seniors and ages 5 to 15 $3. 3601 Sully Rd., Chantilly. 703-437-1794.

TROLLEY MUSEUM -- Ride European and American trolleys, Saturday and Sunday noon to 5. Exhibits free; rides $3, seniors and ages 2 through 17 $2. Northwest Branch Park, 1313 Bonifant Rd., Silver Spring. 301-384-6088.

B&O RAILROAD STATION MUSEUM -- Permanent exhibits include a diorama depicting the trip of Tom Thumb, America's first scheduled passenger train. Adults $4, seniors and students $3, under 13 $2. Open Friday-Saturday and Monday 11 to 4, Sunday noon to 5. 2711 Maryland Ave., Ellicott City. 410-461-1944.

TOP OF THE WORLD -- Presentation about Baltimore and a view of the city from the 27th floor observation level. Open Wednesday through Sunday 10 to 6. $4, seniors $3, ages 3 to 16 $2. World Trade Center, 401 E. Pratt St., Baltimore. 410-837-8439.

Library Programs

ARLINGTON CENTRAL -- Stories for ages 3 to 6, Friday at 10. 1015 N. Quincy St. 703-228-5946.

BELTSVILLE -- Stories for ages 3 to 5, Tuesday at 10:30. 4319 Sellman Rd. 301-937-0294.

BOWIE -- "Unlucky Cinderella" by the Bowie Troupers, Monday at 2 and Tuesday at 7. Stories for ages 3 to 5, Monday at 1 and Thursday at 10:30, and for ages 4 to 6, Tuesday at 7. 15210 Annapolis Rd. 301-262-7000.

CHERRYDALE -- Stories for ages 3 to 7, Wednesday at 7. 2190 Military Rd., Arlington. 703-228-6330.

FAIRMOUNT HEIGHTS -- Storytime for ages 3 to 5, Wednesday at 10:30. 5904 Kolb St. 301-883-2700.

GLENARDEN -- Stories for ages 2 to 5, Thursday at 10:30. 8724 Glenarden Pkwy. 301-772-5477.

GREENBELT -- Stories for ages 3 to 5, Thursday at 10:30. 11 Crescent Rd. 301-345-5800.

HILLCREST HEIGHTS -- Stories for ages 3 to 5, Tuesday and Thursday at 10:30. 2398 Iverson St. 301-630-4900.

LAUREL -- Stories for ages 3 to 6, Wednesday at 7 and Thursday at 10:30. 507 Seventh St. 301-776-6790.

MOUNT RAINIER -- Stories for ages 3 to 5, Tuesday at 11. 3409 Rhode Island Ave., Mount Rainier. 301-864-8937.

NEW CARROLLTON -- Stories for ages 3 to 7, Tuesday at 7. 7414 Riverdale Rd. 301-459-6900.

SPAULDINGS -- Stories for ages 2 to 6, Monday at 7, and for ages 3 to 5, Thursday at 10:30. 5811 Old Silver Hill Rd., District Heights. 301-817-3750.

UPPER MARLBORO -- Stories and activities for ages 3 to 5, Tuesday and Wednesday at 11. 14730 Main St. 301-629-9330.