The annual Holiday Train Display at Thorn Creek United Methodist Church, 142 Rockdale Road, Jefferson Township, continues through Jan. 4. Hours are 4 to 8 p.m. Fridays and noon to 8 p.m. Saturdays and Sundays. Extended hours are planned for Sunday through Jan. 4, when the display will be open from noon to 8 p.m. Soups, sandwiches, snacks and refreshments will be available. Check thorncreekumchurch.org for cancellations due to weather.

Harmony Museum, 218 Mercer St., Harmony, has unveiled the Christmas season model railroad display and extended indefinitely a Flags of Freedom exhibit. From Jan. 10 to Feb. 3, the museum will host “The Civil War in Pennsylvania,” a Heinz History Center traveling exhibit as well as an expansion of the museum’s exhibit on the war’s influences in the county. Guided tours include the 1809 main museum building and wine cellar and a neighboring early 19th century house, both built by the communal Harmony Society, and a Mennonite log house. Tours are offered 1 to 4 p.m. daily except when the museum is closed Mondays and holidays. Admission is $7 for adults, $6 for senior citizens age 60 and older and $3 for youths ages 6 to 17. Call 724-452-7341.

The Old Stone House will be the site of a six-course series of cooking classes beginning Jan. 10. The classes will begin with a basic foundation of how to light a fire using steel and flint, advancing through soup and breads and then moving to full entrees and desserts. Cost for the course is $130. Registration is required. Class size is limited to eight. The Old Stone House is at the intersection of Routes 8, 173 and 528.

PITTSBURGHHeinz History Center, 1212 Smallman St., and its Western Pennsylvania Sports Museum present through Dec. 31 a Steelers’ display featuring items from quarterback Ben Roethlisberger’s NFL and team record-setting passing performances this season. Admission to the museum is $15 for adults, $13 for senior citizens and $6 for children ages 6 to 17 and students. Call 412-454-6000 or visit www.heinzhistorycenter.org.The National Aviary, 700 Arch St., and African penguin parents Sidney and Bette present two newly hatched chicks on www.PenguinNestCam.org. The “Wings in Winter” daily holiday activities, festive décor and a new, musical free-flight bird show continue through Jan. 11. Aviary admission is $14 for adults, $13 for senior citizens age 60 and older and $12 for children ages 2 to 18; shows are extra. Hours are 10 a.m. to 5 p.m. daily; closed Christmas Eve and Christmas Day, but open 10 a.m. to 3 p.m. New Year’s Eve. Call 412-323-7235 or visit www.aviary.org.ToonSeum, Pittsburgh’s Museum of Cartoon Art at 945 Liberty Ave., presents “When Universes Collide: The Ultimate Superhero Smackdown” through Jan. 4. Museum hours are 10:30 a.m. to 3:30 p.m. Mondays, Wednesdays and Thursdays, 10:30 a.m. to 7 p.m. Fridays, 10:30 a.m. to 5 p.m. Saturdays and 11 a.m. to 5 p.m. Sundays; closed Tuesdays and major holidays, such as Christmas Day and New Year’s Day. Admission is $8 for those older than 13 and $4 for children ages 6 to 12. Senior citizens, college students, veterans and active military pay $7. Call 412-232-0199 or visit toonseum.org.Children’s Museum, 10 Children’s Way, Allegheny Square, hosts the exhibit “Bounce: Inspired by the World’s Most Amazing Ball!” and through Feb. 1 the annual Tough Art exhibit. Admission is $14 for adults and $13 for children ages 2 to 18 and senior citizens. Children younger than 2 are admitted free. The museum is open 10 a.m. to 5 p.m. daily; closed Christmas Day and New Year’s Day. Call 412-322-5058 or visit www.pittsburghkids.org.Carnegie Science Center next to Heinz Field on the North Side has opened the Miniature Railroad & Village with its new addition, a model of the Buhl Planetarium & Observatory. Lionel Days continue through Jan. 1. The Science Center also continues the exhibit “Blue!” through Jan. 1. Center hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays, except closed Christmas Day and Sunday for the home Steelers game. General admission is $17.95 for adults and $11.95 for children ages 3 to 12. Call 412-237-3400 or visit CarnegieScienceCenter.org.