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 Dec. 28 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. 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.

Phipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, hosts the Winter Flower Show through Jan. 11. Additionally, Phipps and Pittsburgh Ballet Theatre will present the Sugarplum Fairy, 30-minute creative movement classes for children of all ages, at 10:30 a.m. Saturdays, free with Phipps admission, which is $15 for adults; $14 for students and seniors; and $11 for children ages 2 to 18. Call 412-622-6914.Heinz History Center, 1212 Smallman St., hosts “Pittsburgh's Lost Steamboat: Treasures of the Arabia” through Jan. 4. An exhibition showcasing the Heinz company also continues. History Center admission is $15 for adults, $13 for senior citizens age 62 and older, and $6 for students and children ages 6 to 17. Call 412-454-6000 or visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., presents “Wings in Winter” daily holiday activities, festive décor and a new, musical free-flight bird show through Jan. 11. Admission of $14 for adults, $13 for senior citizens age 60 and older and $12 for children ages 2 to 18. 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.orgToonSeum, 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. Admission is $6 for those over age 13 and $3 for children ages 6 to 12. Senior citizens, college students, veterans and active military pay $5. 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, except major holidays. Call 412-322-5058 or visit www.pittsburghkids.org.Carnegie Museum of Natural History, 4400 Forbes Ave. in Oakland. Hours are 10 a.m. to 5 p.m. Mondays and Wednesdays through Saturdays and noon to 5 p.m. Sundays with extended hours until 8 p.m. Thursdays. Closed now Tuesdays instead of Mondays. Admission is $17.95 for adults, $14.95 for senior citizens age 65 and older, and $11.95 for students with ID and children ages 3 to 18. Admission after 4 p.m. Thursdays is $10 per adult/senior citizen and $5 per student/child. Call 412-622-3131 or by visiting www.carnegiemnh.org.