TODAY
Jam session. Cocalico Valley Jammers, Denver Fire Company, 425 Locust St., 1-5 p.m.; free, players, singers, dancers and listeners welcome. Call 859-3545.

Concert. Ann Koscielny, piano, Pennsylvania Academy of Music, 42 N. Prince St., 3:30 p.m.; $12.50-$25. Call 399-9733.

MONDAY
Country dance. Ritz on Main, 138 E. Main St., New Holland, 8 p.m.; $5. Call 351-7489.

TUESDAY
Concert. Pianafiddle, Lancaster Mennonite High School, 2176 Lincoln Highway East, 8 p.m.; $30. Call 392-7658.

THURSDAY
World dance. Mulberry Art Studios, 21 N. Mulberry St., 7:30-9:30 p.m.; $5-$6. Call 392-8251.

FRIDAY
Country line dance. Country Barn, 211 S. Donnerville Road, 7 p.m.-midnight; $5. Call 872-1554.

Concert. Two high school gospel choirs, McCaskey High School, 445 N. Reservoir St., 6:30 p.m.; $3-$5. Call 399-6400, ext. 3.

SATURDAY
Concert. Shelly Moorman-Stahlman, organ, St. Peter's Lutheran Church, 10 Delp Road, 7:30 p.m.; offering. Call 733-9712.

SUNDAY, JAN. 11
Concert. Musical Art Society's "A Musical Winterlude," Salem United Church of Christ, 2312 Marietta Ave., 3 p.m.; $3-$5. Call 392-1200.

Acoustic jam session. Lancaster County Folk Music & Fiddlers' Society, Friends Meeting House, 110 Tulane Terrace, 2-5 p.m.; free. Call 610-777-7922.

Concert. David and Jennifer Felty, Faith United Methodist Church, 1290 Fruitville Pike, 6 p.m.; offering. Call 560-0321.

SEASONAL
Model train display. Stiegel Valley Model Railroad, 230 S. Charlotte St., Manheim, 1-4 p.m. Sunday, ends Jan. 11; offering. Call 299-1414.

RECURRING
Amish Country Homestead. Nine-room Amish house, Plain & Fancy Farm, Route 340, Bird-in-Hand, tours at quarter to the hour, 9:45 a.m.-3:45 p.m. and 4:15 p.m. Monday through Saturday, 10:45 a.m.-4:15 p.m. Sunday; $4.95-$8.95. Call 768-3600, ext. 210.

Amish Country Tours. Tour Amish farmlands with local guides, Plain & Fancy Farm, Route 340, Bird-in-Hand, two-hour tours 10:30 a.m. and 1:45 p.m. Monday through Saturday, 11:30 a.m. Sunday; $11.95-$28.95. Call 768-3600, ext. 210.

Amish Experience F/X Theater. Plain & Fancy Farm, Route 340, Bird-in-Hand, "Jacob's Choice" on the hour 9 a.m.-5 p.m. Monday through Saturday, 11 a.m.-5 p.m. Sunday; $5.95-$9.95. Call 768-3600, ext. 210.

Amish Farm and House tours. 2395 Route 30 East, 8:30 a.m.-4 p.m. daily; $5-$7.75. Call 394-6185.

Amish Village. Old Order Amish house and grounds, 199 Hartman Bridge Road, Ronks, 9 a.m.-5 p.m. Monday through Saturday, 10 a.m.-5 p.m. Sunday; $3.25-$7.25. Call 687-5811.

Boehm's Chapel. A 1791-built chapel, oldest existing Methodist structure in Pennsylvania, 13 W. Boehm's Road, Willow Street, tours noon-2 p.m. Saturday, noon-1 p.m. Sunday. Call 872-4133.

Choo Choo Barn. Route 741 East, Strasburg, 10 a.m.-5 p.m. daily; $3.50-$5.50. Call 687-7911.

Coleman Memorial Chapel. Built in 1874, 1980 Furnace Hills Pike, 6-10 p.m. Wednesday and Thursday; free. Call 626-6933.

Ice Park at Clipper Magazine Stadium. 650 N. Prince St., 6-10 Friday, noon-10 p.m. Saturday, noon-6 p.m. Sunday, ends March 1; $6, $3 skate rental. Call 509-1340.

Lancaster Ice Rink. Public skate, 371 Carerra Drive, 7:30-9:30 p.m. Saturday, 1-3 p.m. Sunday; $5 admission, $2 skate rental. Call 581-0274.

Longwood Gardens. Route 1, Kennett Square, 9 a.m.-6 p.m. daily; $2-$12. Call 610-388-1000 for special events.

Overlook Activities Center. Public roller skating, 1241 Lititz Pike, 7:30-10:30 p.m. Friday and Saturday, 1-4 p.m. Saturday and Sunday; $4-$9. Call 290-7180.

REGIONAL
Giant Center. 550 W. Hersheypark Drive, Hershey. Call 534-3911. Sesame Street Live, "When Elmo Grows Up," 1 and 4:30 p.m. today, Jan. 4; $10-$28.

ART EXHIBITS
"David Brumbach Unbound: Pages From His Book." Demuth Foundation and Museum, 120 E. King St., 10 a.m.-4 p.m. Tuesday through Saturday, 1-4 p.m. Sunday, ends Jan. 4. Call 299-9940.

"Impressions and Investigations," and "Holiday greetings." Lancaster County Art Association, 149 Precision Ave., Strasburg, 1-5 p.m. Wednesday through Sunday, ends Jan. 8. Call 687-7061.

"Faculty Biennial." Pennsylvania College of Art & Design, 204 N. Prince St., 8 a.m.-4:30 p.m. Monday through Friday, ends Jan. 9. Call 396-7833.

Stephen March, mixed media. Keystone Art & Cultural Center, 420 Pearl St., 5-9:30 p.m. the first and fourth Friday of the month and 10 a.m.-4 p.m. Wednesday, ends Jan. 23. Call 870-4869.

"Unguarded Moments: Backstage and Beyond," Theresa Kereakes. Metropolis Gallery, 154 N. Prince St., 11 a.m.-6 p.m. Monday through Thursday, 10 a.m.-6 p.m. Friday and Saturday, ends Jan. 31. Call 572-9961.

Kathy Breidenbaugh and Cathy Moyer. Harvest View lobby, Landis Homes, 1001 E. Oregon Road, Lititz, 9 a.m.-6 p.m. daily, ends Jan. 31. Call 581-3935.

"New Year, New Photography," Ann M. Darkes and Maria Fuhrman. Framing Concept Gallery, 328 N. Queen St., 10 a.m.-5 p.m. Tuesday through Saturday, ends Jan. 31. Call 295-7290.

"Winter Exposition." Annex 24 Gallery, 24 W. Walnut St., 10 a.m.-5 p.m. Thursday, 10 a.m.-6 p.m. Friday and Saturday, ends Jan. 31. Call 341-0028.

"Signature Collection," David Brumbaugh and more. D&J Scott Gallery, 323 N. Queen St., 10 a.m.-5 p.m. Tuesday, Friday and Saturday, ends Jan. 31. Call 397-5360.

Ron Ettelman. Red Raven Art Co., 138 N. Prince St., 10 a.m.-5 p.m. Tuesday, Thursday, Friday and Saturday, ends Feb. 3. Call 299-4400.

LIVE MUSIC
American Music Theatre. 2425 Lincoln Highway East. Call 397-7700. ABBA: The Music, 8 p.m. Friday, $45; Jay and the Americans, Shangri-Las, Kenny Vance and Planotones, Chubby Checker, Otis Day and the Knights, 8 p.m. Saturday, $40.

Caribbean Inn. 1 S. Charlotte St., Manheim. Call 665-6589. Open mic, 8 p.m. Thursday.

The Chameleon Club. 223 N. Water St. Call 393-7133. Ben Britten, 8 p.m. Wednesday, $5, over 21 in the Lizard Lounge; Hexbelt, Barrel of Wolves and High Falootin', 8 p.m. Friday, $6, over 21; Anberlin, Madina Lake and Between the Trees, 6:30 p.m. Saturday, $16, all ages; Shadowland, Kiltboy and Neidermeyer, 9 p.m. Saturday, $5, over 21 in the Lizard Lounge.

Huckleberry's. Fulton Steamboat Inn, routes 30 and 896. Call 299-9999. Bill Horn, 5:30 p.m. Friday and Saturday, free.

Pressroom. 26-28 W. King St. Call 399-5400. Troy Isaak Trio, 7 p.m. Wednesday; Tom Pontz Trio, 7 p.m. Thursday.

Prudhomme's Lost Cajun Kitchen. 50 Lancaster Ave., Columbia. Call 684-1706. Keith Kinard, 7 p.m. Wednesday.

Shank's Tavern. 36 S. Waterford Ave., Marietta. Call 426-1205. Open mic with Stu Huggins or Guy Debeau, Mark and Danny, 8 p.m. Tuesday; open mic with Blue Voodoo or BRB, 8 p.m. Thursday.

THEATER
"42nd Street." Fulton Opera House, 12 N. Prince St., 2 p.m. today, ends Jan. 4; $17-$42. Call 397-7425.

Ryan and Friends. Ephrata ACT, Main Theater, 124 E. Main St., 11 a.m. Saturday, ends Jan. 10; offering. Call 738-2228.

"Wizard of Oz," with muppet-style puppets. Hole in the Wall Puppet Theatre, 126 N. Water St., 10 a.m. Friday and Saturday, ends Feb. 28; $9. Call 394-8398.

MUSEUMS
Boettcher House Museum. Built in 1870, Landis Woods, 1241 Lititz Pike, 10 a.m.-4 p.m. the second weekend of every month. Call 290-7180, ext. 3102.

Brandywine River Museum. Regional and American art, Route 1, Chadds Ford, 9:30 a.m.-4:30 p.m. daily; $5-$8. Call 610-388-2700.

Carriage Gallery. 1800s horse-drawn carriages, coaches, sleighs and hearses and 1800s lighting, 276 Newport Road, Leola, hours by appointment; $5. Call 656-7347.

Conestoga Area Historical Society. Candlelight Christmas, Ehrlich Park, 51 Kendig Road, Conestoga, 1-4 p.m. Friday and Saturday; offering. Call 872-1699.

Ephrata Cloister. Site of an 18th-century religious community, 632 W. Main St., 9 a.m.-5 p.m. Monday through Saturday, noon-5 p.m. Sunday; $5-$7. Call 733-6600.

Hands-on House. Interactive children's museum, 721 Landis Valley Road, 11 a.m.-4 p.m. Tuesday through Thursday, 11 a.m.-8 p.m. Friday, 10 a.m.-5 p.m. Saturday, noon-5 p.m. Sunday; $7. Call 569-5437.

Hans Herr House. Built in 1719, 1849 Hans Herr Drive, Willow Street, 9 a.m.-4 p.m. Monday through Saturday; $2-$5. Call 464-4438.

Historical Society of the Cocalico Valley. Victorian mansion with regional history displays and period room settings, 249 W. Main St., Ephrata, 10 a.m.-4 p.m. Thursday and Saturday; free admission, $3 for research library. Call 733-1616.

Lancaster County Historical Society. 230 N. President Ave., 9:30 a.m.-4:30 p.m. Tuesday through Saturday; free admission, $5 for research library. Call 392-4633.

Lancaster Mennonite Historical Society. Unique Pennsylvania German artifacts, 2215 Millstream Road, 8:30 a.m.-4 p.m.; $4.50-$5. Call 393-9745.

Lancaster Science Factory. Hands-on approach to science, technology, engineering and math, 454 New Holland Ave., 10 a.m.-5 p.m. Monday through Saturday, noon-5 p.m. Sunday; $6-$7. Call 509-6363.

Landis Valley Museum. A Pennsylvania German living-history village, 2451 Kissel Hill Road, 9 a.m.-5 p.m. Monday through Saturday, noon-5 p.m. Sunday; $7-$10. Call 569-0401.

Lititz Museum and Johannes Mueller House. 145 E. Main St., 10 a.m.-4 p.m. Monday through Saturday; $5. Call 627-4636.

Manheim Historical Society Railroad Station. 210 S. Charlotte St., 1-4 p.m. Sunday; free. Call 665-7989.

Mascot Roller Mills and Ressler Family Home. Preserved, water-powered grain mill and 1855 miller's house, Newport and Stumptown roads, Ronks, 10 a.m.-4 p.m. Tuesday through Saturday. Call 656-7616.

Maytown Historical Society Museum. 4 W. High St., 2-4 p.m. Sunday. Call 426-3308.

Mount Joy Historical Society Museum. 130 Fairview St., Mount Joy, 1-4 p.m. Sunday. Call 653-4718.

National Civil War Museum. 1 Lincoln Circle, Reservoir Park, Harrisburg, 10 a.m.-5 p.m. Wednesday through Saturday, noon-5 p.m. Sunday; $6-$8. Call 260-1861.

National Toy Train Museum. 300 Paradise Lane, Strasburg, 10 a.m.-5 p.m. weekends; $2.50-$12. Call 687-8976.

National Watch & Clock Museum. Fifth and Poplar streets, Columbia, 10 a.m.-5 p.m. Tuesday through Saturday, noon-4 p.m. Sunday; $4-$8. Call 684-8261, ext. 234.

New Holland Band Museum. Second floor, Eastern Lancaster County Library, New Holland, 10 a.m.-4 p.m. Tuesday, Thursday and Saturday; free. Call 355-5096.

North Museum of Natural History and Science. 400 College Ave., 10 a.m.-5 p.m. Tuesday through Saturday, noon-5 p.m. Sunday; $6-$7 museum and planetarium. Call 291-4315.

People's Place Quilt Museum. Route 340, Intercourse, 9 a.m.-5 p.m. Monday through Saturday; free. Call 800-828-8218.

Railroad Museum of Pennsylvania. Route 741, Strasburg, 9 a.m.-5 p.m. Monday through Saturday, noon-5 p.m. Sundays; $4-$6. Call 687-8628.

State Museum of Pennsylvania. 300 North St., Harrisburg, 9 a.m.-5 p.m. Tuesday through Saturday, noon-5 p.m. Sunday; free. Call 787-4980.

Underground Railroad Visitors Center. Historic Zercher's Hotel, 11 Green St., Christiana, 9 a.m.-4 p.m. daily; free. Call 610-593-5340.

Winters Heritage House. 47 E. High St., Elizabethtown, 9:30 a.m.-3:30 p.m. Thursday and Friday, 9:30 a.m.-noon Saturday. Call 367-4672.

Winterthur Estate. American antiques, 60-acre garden and research library for American art and material culture, Route 52, 6 miles north of Wilmington, Del., 9 a.m.-5 p.m. Monday through Saturday, noon-5 p.m. Sunday. Call 302-888-4600.