COUNTYButler County Historical Society’s Senator Walter Lowrie House Museum on Saturday concludes the last public showing of “The Civil War in Pennsylvania,” a 500-square-foot exhibit featuring four life-size historic figures, modular panels describing Pennsylvania’s contributions, and original items from the collections of the historical society. Hours are 10 a.m. to 4 p.m. through Saturday. Admission is free, though donations are accepted. Call 724-283-8116 or visit www.butlerhistory.com.Harmony Museum, 218 Mercer St., presents its annual Christmas season model railroad displays. They will continue into early January. Museum tours are offered from 1 to 4 p.m. daily except when the museum is closed Mondays. Admission is $7 for adults, $6 for senior citizens, and $3 for youths ages 6 to 17. Call 724-452-7341.

REGIONThe annual miniature railroad display in Emlenton is open weekends through January. The layout is open from 12:30 to 5 p.m. Saturdays and Sundays at Donaldson Motors, 714 River Ave. The main layout is HO-scale and covers 60 square feet. There also are three 4- by 8-foot displays featuring Lionel, Marx, American Flyer and Thomas the Tank Engine along with miniature train engines, cars and trucks. Admission is free, but donations are accepted to help cover costs. Call 724-867-2293.

PITTSBURGHCarnegie Science Center, North Side, has reopened the Miniature Railroad and Village. New this year is a replica of Crawford Grill, a jazz club in the Hill District from 1937 to 1951. Hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. The center will be closed Sunday. General admission is $18.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org.Phipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, is presenting the Winter Flower Show and Light Garden. The outdoor areas open at 5 p.m. Admission is $15 for adults, $14 for seniors and students and $11 for children ages 2 to 18. Call 412-622-6914.Heinz History Center, 1212 Smallman St., presents a Kaufmann’s/Macy’s holiday display through January, with items that are among more than 100 historical objects recently donated to the history center by Macy’s. The “We Can Do It!” WWII exhibition continues through Jan. 3. Center hours are 10 a.m. to 5 p.m. daily. Admission is $15 for adults, $13 for seniors, and $6 for children ages 6 to 17. Admission for active and retired military is $6. Visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., will host a new program, Fleury’s Kids Only Night Out from 5 to 9 p.m. Saturday for children in kindergarten through fifth grade. Call 412-258-9439 for cost and required registration. Hours are 10 a.m. to 5 p.m. daily. Admission is $14 for adults, $13 for senior citizens and $12 for children ages 2 to 18; shows are extra. Visit www.aviary.org.Children’s Museum, Allegheny Square, presents the display “Voyage to Vietnam: Celebrating the Tet Festival” through Jan. 17. The museum is open 10 a.m. to 5 p.m. daily. Admission is $14 for adults and $13 for children ages 2 to 18 and senior citizens. Visit www.pittsburghkids.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, presents “Out of This World! Jewelry in the Space Age,” and “Animal Secrets” through Jan. 10. Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children ages. Visit www.carnegiemnh.org.