COUNTYButler County Historical Society’s Senator Walter Lowrie House Museum presents 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. Wednesdays through Saturdays through Dec. 19. 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.

PITTSBURGHPhipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, presents the Winter Flower Show and Light Garden. The outdoor areas open at 5 p.m. The conservatory will remain open until 11 p.m. for candlelight evenings throughout the show, except on Dec. 24 when it will close at 5 p.m. and remain closed until Dec. 26. The flower show and garden will continue through Jan. 10. 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, including artifacts from the store’s beauty salons, Tic Toc restaurant, and Arcade Bakery. The “We Can Do It!” WWII exhibition continues through Jan. 3. History center 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., has new male snowy owls “Tundra” and “Glacier” on exhibit until temperatures warm in spring. Aviary 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, concludes the 16th annual Mister Rogers’ Neighborhood Sweater Drive on Tuesday. The display “Voyage to Vietnam: Celebrating the Tet Festival” runs 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 the interactive exhibit “Animal Secrets.” Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children ages 3 to 18. Visit www.carnegiemnh.org.Carnegie Science Center, North Side, has reopened the Miniature Railroad and Village for the season. New this year is a replica of Crawford Grill, a jazz club in the Hill District from 1937 to 1951. The science center is open regularly from 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. General admission is $18.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org.