Harmony Museum, 218 Mercer St., Harmony, offers guided tours from 1 to 4 p.m. daily except when closed on Mondays and holidays. Admission is $7 for adults, $6 for senior citizens and older, and $3 for youth ages 6 to 17. Call 724-452-7341 or visit www.harmonymuseum.org.

Carnegie Science Center, North Side, concludes Lionel Days on Wednesday. The Miniature Railroad is free with general admission, which is $17.95 for adults and $11.95 for children ages 3 to 12. Call 412-237-3400.Phipps Conservatory and Botanical Gardens, 1 Schenley Park, presents the Winter Flower Show from 9:30 a.m. to 11 p.m. daily. The Winter Light Garden runs from 5 to 11 p.m. Admission is $15 for adults, $14 for senior citizens and students, and $11 for children ages 2 to 18. Call 412-622-6914 or visit phipps.conservatory.org.Heinz History Center, 1212 Smallman St., hosts “Poptastic!” focusing on Pittsburgh artist Burton Morris and more than 100 original works of art through Feb. 23. The exhibit “Pennsylvania’s Civil War” continues through Jan. 5. Center admission is $15 for adults, $13 for senior citizens, and $6 for children ages 6 to 17. Call 412-454-6000 or visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., welcomes a new pair of Andean Condors in the outdoor exhibit. Another exhibit, “Canary’s Call,” showcases four signature bird species, a number of other birds from around the world, as well as a flying mammal: the Malayan flying fox, which is a species of large fruit bat. The interactive free-flight show “Beaks!” runs daily at 11 a.m. and 3 p.m. through Wednesday; this show is $5 in addition to the regular cost of admission, which is $13 for adults, $12 for senior citizens, $11 for children ages 2 to 18, and free for children younger than 2. Regular hours are 10 a.m. to 5 p.m. daily, but the aviary will close at 3 p.m. Tuesday for New Year’s Eve. Call 412-323-7235 or visit www.aviary.org.Children’s Museum, 10 Children’s Way, Allegheny Square, will be closed Wednesday for New Year’s Day. Extended holiday hours are 9 a.m. to 5 p.m. through Tuesday. Regular hours are 10 a.m. to 5 p.m. daily, except holidays. The exhibit Tape Scape, a massive indoor landscape made of 360 rolls (that’s 22 miles!) of packing tape, continues through Jan. 19. Admission is $13 for adults, and $12 for children ages 2 to 18 and senior citizens. Call 412-322-5058 or visit www.pittsburghkids.org.Carnegie Museum of Natural History, 4400 Forbes Ave. in Oakland, is displaying its decorated holiday trees, six fresh 20-foot Colorado spruce trees with the theme “Embracing the Art of Play,” through Jan. 12. The Neapolitan presepio Italian Nativity scene is on view through Jan. 9. Call 412-622-3131 or visit www.carnegiemnh.org.