Concerts CSM COMMUNITY CHORUS -- 3 p.m. Monday. Community members sing Handel's "Messiah." Fine Arts Center, College of Southern Maryland, La Plata campus, 8730 Mitchell Rd. $5. 301-934-7863.

COLLEGE OF SOUTHERN MARYLAND CHOIRS -- The Concert Choir and Chamber Choir are on tour, 8 p.m. Saturday at the Fine Arts Center Theatre, College of Southern Maryland, La Plata campus, 8730 Mitchell Rd.; 5 p.m. Sunday at Christ Church, 110 E. Charles St., La Plata; 4 p.m. Wednesday at Charles County Department of Community Services, 8190 Port Tobacco Rd., Port Tobacco; and 7 p.m. Wednesday at Peace Lutheran Church, 401 E. Smallwood Dr., Waldorf. Saturday, $5; other concerts, free. 301-934-7828, 301-870-3008, 301-934-7788 (TDD) or www.csmd.edu/events/finearts/index.

CHESAPEAKE CHORAL ARTS SOCIETY -- 7:30 p.m. Saturday. The Tidings of Comfort and Joy concert is funded in part by a grant from the Charles County Arts Alliance. Christ Church, 110 E. Charles St., La Plata. $10; seniors and students, $6; children 3-12, $4; younger than 3, free. 301-934-9382, 301-932-0067 or 301-862-9541.

GOSPEL CONCERT -- 6 p.m. Sunday. The Easter Brothers and the Bluegrass Gospel Express. Hollywood Church of the Nazarene, 24710 Sotterley Rd., Hollywood. Donations accepted. 301-373-2130.

ST. MARIES MUSICA -- 7:30 p.m. Monday. The group performs at Patuxent Presbyterian Church, 23421 Kingston Creek Rd., California. Free. 301-737-4365.

CALVERT CHRISTMAS CONCERT -- 7 p.m. Wednesday (choral groups) and 7 p.m. next Thursday (instrumental groups). Calvert High School, 600 Dares Beach Rd., Prince Frederick. Free. 401-535-7351 or 410-535-7330.

Dance AQUA SQUARE DANCING -- 7:30-9:30 p.m. every Friday. The Aqua Squares Square Dance Club of Calvert County holds a dance at the Southern Community Center, 20 Appeal Lane, Lusby. $5. 410-326-2676 or 301-373-2207.

MERRY-LANDERS SQUARE DANCING -- 7:30-9:30 p.m. every Friday. Dances are held by square dance club the Southern Merry-Landers, at John Hanson Middle School, 12350 Vivian Adams Rd., Waldorf. $5.50; members, $4. 301-893-1974.

Exhibits DOLL AND TRAIN EXHIBIT -- Noon-4 p.m. Wednesdays-Sundays, through Jan. 4. Head for the Little Red Schoolhouse on the museum's grounds for your fill of trains and dolls, or stroll through the museum proper for an abundance of teddy bears. An informative exhibit about President Theodore Roosevelt celebrates the teddy bear's 100th anniversary. Children will be offered a special treat if they can correctly guess the number of bears on display. St. Clement's Island-Potomac River Museum, 38370 Point Breeze Rd., Colton's Point. $1. 301-769-2222.

CHRISTMAS SHOW AND SMALL PACKAGES -- 11 a.m.-6 p.m. Wednesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Dec. 24. The main gallery hosts the 16th annual Christmas All-Member Show, while the Mulberry Fields Room is devoted to works 8-by-10-inches or smaller. North End Gallery, 41625 Fenwick St., Leonardtown. Free. 301-475-3130 or www.northendgallery.org.

MAIN STREET GALLERY'S 11TH YEAR -- 11 a.m.-5 p.m. Wednesdays-Fridays and 11 a.m.-4 p.m. weekends, Saturday through Dec. 23. "Spirit, Creativity and Surprise" features works by Parran Collery, Yvonne Creighton, Fanchon, Jerry Hovanec, Bo Jia, Diana Marta, Ruthann Uithol and others. Main Street Gallery, 486 Main St. Prince Frederick. Free. 410-535-3334.

20 YEARS OF CARMEN'S -- 10 a.m.-5 p.m. Tuesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Christmas. All gallery artists have been invited to submit one new work especially designed for this anniversary exhibition. Carmen's Gallery, Dowell Road, Solomons. Free. 410-326-2549 or www.carmensgallery.com.

CARLTON FLETCHER -- Noon-5 p.m. Mondays and Wednesdays; 3:30-7 p.m. Tuesdays, Thursdays and Fridays; and an hour before CSM performances, through Jan. 26. A retrospective of drawings and paintings by Carlton Fletcher. Tony Hungerford Memorial Gallery, College of Southern Maryland, 8730 Mitchell Rd., La Plata. Free. 301-934-7828, 301-870-3008 or 301-884-8131, Ext. 7828.

HOLIDAY SHOW AND SALE -- 11 a.m.-4 p.m. tomorrow-Sunday. Various artists represented. Mattawoman Creek Art Center at Smallwood State Park, Sweden Point Road, Marbury. Free. 301-743-5159 or www.mattawomanart.org.

For Children TINY TOT TROT -- 10 a.m. today. A puppet show for children ages 2 and 3 explains what kinds of winter treats animals enjoy. Reservations are required. Battle Creek Cypress Swamp, Gray's Road, Prince Frederick. $3; Battle Creek Nature Education Society members, $1. 410-535-5327, 800-735-2258 (TDD) or www.calvertparks.org.

NATURE EXPLORERS -- 2 p.m. Saturday. Children ages 6-9 can join a naturalist to discover the world of snow and create a blizzard of your own. Reservations are required. Battle Creek Cypress Swamp, Gray's Road, Prince Frederick. $3; Battle Creek Nature Education Society members, $1. 410-535-5327, 800-735-2258 (TDD) or www.calvertparks.org.

BRUNCH WITH SANTA -- 7 a.m.-noon Saturday, meet Santa and eat from a set menu; 10 a.m.-2 p.m. Sunday, eat from the buffet or a la carte. Maryland Way Restaurant, Holiday Inn Select, 155 Holiday Dr., Solomons. Saturday, $9.59; children 5-12, $4.99. Sunday buffet, $15.99; children 5-12, $7.99. 410-394-3618.

Lectures and Literature PAUL McMULLEN -- 7-8 p.m. Saturday. The Baltimore Sun's basketball reporter signs copies of his book, "Maryland Basketball: Tales From Cole Field House." Borders Books, 3304-A Crain Hwy., Waldorf. Free. 301-705-6672.

POETRY OPEN MIKE -- 7 p.m. Wednesday. Present your original or favorite poetry. Calvert Library, 30 Duke St., Prince Frederick. Free. 410-535-0291 or 301-855-1862.

"THE BEST CHRISTMAS PAGEANT EVER" -- 2-3:30 p.m. Wednesday. The Book Club discusses Barbara Robinson's funny seasonal book. Fairview Branch Library, 8120 Southern Maryland Blvd., Owings. Free. 410-257-2101.

BOOK CLUB SOUTHERN BRANCH -- 2 p.m. Dec. 21. Discuss either "Fallen Angel: A Novel" by Don Snyder (Christmas fiction) or "The Inn at the Edge of the World" by Alice Ellis (British fiction). Southern Branch Library, 20 Appeal Way, Lusby. Free. 410-326-5289.

Theater "MURDER IN ELSINORE" -- 8 p.m. tomorrow. Port Tobacco's traveling murder mystery is offered for the last time. Dessert is served during intermission. Christ Church, 110 E. Charles St., La Plata. $12. 301-943-3249 or 301-743-5937.

"A CHRISTMAS CAROL" -- 8 p.m. tomorrow and Saturday; 3 p.m. Saturday and Sunday. Port Tobacco Players present the Dickens classic. Port Tobacco Players Theatre, 508 Charles St., La Plata. $12; seniors and students, $10. 301-932-6819.

"A SEASON, A SAVIOR, A STAR" -- 7 p.m. Sunday. Calvary Gospel Church presents a Christmas musical featuring the Voices of Victory Choir and Drama Troupe. 11150 Berry Rd., Waldorf. Free. 301-843-5588.

Miscellaneous CANDLELIGHT TOURS OF SOTTERLEY -- 6-9 p.m. tomorrow and Saturday. Step back to a 1791 Christmas on a candlelight tour with homemade cookies, hot wassail and live seasonal music. Reservations are required. Sotterley Plantation, 44300 Sotterley Lane, Hollywood. $10; groups of 20 or more, $8. 301-373-2280 or 800-681-0850.

SOLOMONS CHRISTMAS WALK

Solomons celebrates Christmas with candlelit streets, entertainment, puppet shows and nighttime boat parades. Highlights include the boat parade 6:30-8 p.m. Saturday; a Nativity scene 6:30-8:30 p.m. tomorrow and Saturday; and pet portraits 10 a.m.-1 p.m. Saturday. In the evenings, park in Glasscock Field across from the Calvert Marine Museum, Route 2/4, Solomons. Free shuttle service will be provided 6-9 p.m. For a complete list of activities and locations, call 410-326-1950, 888-580-3865 or 410-326-2549, or visit www.sba.solomons.med.us.

ACLT GREENS AND HAYRIDES -- 11 a.m.-1 p.m. Saturday. Enjoy hayrides to the beach, hot cider and a greens sale hosted by the American Chestnut Land Trust. Warrior's Rest, Scientists Cliffs Road, Port Republic. Free. 401-586-1570.

CHRISTMAS OPEN HOUSE -- Noon-4 p.m. Saturday. Bring your teddy bear to a party with birthday balloons and cake, as well as entrance to the current doll and train exhibit. There will be face painting, live music and visits with Santa. St. Clement's Island-Potomac River Museum, 38370 Point Breeze Rd., Colton's Point. Free. 301-769-2222.

OYSTER ORNAMENTS -- 2 p.m. Sunday. Families are invited to create ornaments from oyster shells. Reservations are required. Flag Ponds Nature Park, Route 4, Lusby. $3; Battle Creek Nature Education Society members, $1. 410-535-5327, 800-735-2258 (TDD) or www.calvertparks.org.

FREEDOM TREE FESTIVAL -- 4-7:30 p.m. Sunday, enjoy games and holiday crafts, fire engine rides, pictures with Santa ($5), a moon bounce, face painting, music, dancing and refreshments for sale in the former Lexington Park Library, South Coral Drive, Lexington Park; 7:30-8:30 p.m. Sunday, join Santa for a tree-lighting ceremony and fireworks at Millison Plaza, N. Shangri-La Drive, Lexington Park. Free. 301-862-9816.

Plan Ahead RADIO KING ORCHESTRA -- 8 p.m. Dec. 20. The orchestra performs as part of the Woman's Club of St. Mary's County's Performing Arts Series. Great Mills High School, 21130 Great Mills Rd., Great Mills. $20; children, $15. 301-475-3225 or 301-475-9039.

DINNER THEATER TRIP -- 11 a.m.-7:30 p.m. Jan. 26. Reserve tickets by Jan. 8 for a bus trip to Riverside Center in Fredericksburg to see "London of Charles Dickens" along with dinner, dessert and a drink. Bus picks up passengers in Hollywood, Waldorf and La Plata. $70. 301-884-8728, 240-925-0801 or 301-737-0620.

-- Compiled by Carrie Donovan

The Southern Maryland Extra Entertainment Calendar lists events as space permits. Mail announcements and photos -- noting date, time, address, cost and phone number -- to Carrie Donovan, Southern Maryland Extra, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071. You may also e-mail announcements to donovanc@washpost.com or fax them to 202-334-5417. Deadline is 14 days before publication.

Solomons Island's Christmas fun includes a parade of lighted boats from 6:30 to 8 p.m. Saturday.