COUNTYHarmony Museum, 218 Mercer St., will be part of the annual New Year’s Eve and German heritage celebration, Silvester, which starts at 3:30 p.m. Dec. 31. The countdown into the New Year will kick off around 6 p.m. — or midnight in Germany. Most of the festivities wrap up by 6:30 or 7 p.m. Attractions will include self-guided museum tours, a dinner, the comedic short film “Dinner for One,” and the annual Christmas tree toss for adults and wreath toss for children. Music and fireworks are also planned. Call the museum at 724-452-7341.

PITTSBURGHHeinz History Center, 1212 Smallman St., continues “Destination Moon: The Apollo 11 Mission,” which explores the space race through Feb. 18. Hours are 10 a.m. to 5 p.m. daily, except holidays. Admission is $18 for adults, $15 for senior citizens, $9 for children 6 to 17, and free for children 5 and younger. Military receive $2 off admission. Call 412-454-6000.National Aviary, 700 Arch St., will have extended evening hours until 9 p.m. as well as refreshments and music on Thursday and Dec. 26, 27 and 28. The aviary will also feature light displays on its building and habitats, from December through early January. Hours are daily from 10 a.m. to 5 p.m. Admission is $15 for adults and $14 for senior citizens and children 2 to 12. Call 412-323-7235.Children’s Museum, Allegheny Square, hosts “Rube Goldberg: The World of Hilarious Invention!” through May 5, “Native Voices” through Jan. 6 and “Tough Art” through Jan. 13. Regular hours are 10 a.m. to 5 p.m. daily, except holidays. The Children’s Museum will be closed Dec. 25 but will be open from 9 a.m. to 5 p.m. Dec. 26 to 31. Admission is $16 for adults and $14 for children 2 to 18 and senior citizens. Call 412-322-5058.Carnegie Science Center, North Side, presents the Lego exhibit “The Art of the Brick” through Jan. 7. MessFest, Carnegie Science Center’s tradition to kick off the New Year, is free with general admission on Jan. 1 and features the slimiest and gooiest activities for visitors of all ages from 10 a.m. to 5 p.m. Regular science center hours are 10 a.m. to 5 p.m. The center will close at 4 p.m. Monday and Dec. 31, and will be closed all day on Tuesday and Dec. 30. Admission is $19.95 for adults and $11.95 for children ages 3 to 12; films are extra. Call 412-237-3400.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, hosts the exhibition “Reptiles: Live!” which includes 19 dioramas through May 12. The Museums of Natural History and Art are open 10 a.m. to 5 p.m. daily, except closed Tuesdays and holidays, plus hours are extended until 8 p.m. most Thursdays. Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children 3 to 18. Call 412-622-3131.