Harmony Museum on Mercer Street in Harmony, representing the town founded in 1804 by pacifist German Lutheran Separatists and their Harmony Society, has expanded its Christmas season model railroad display. The antique Yobp-Eckstein log village and O gauge railroad is joined by an HO gauge layout. Also new is a “hands-on” wood push train for preschoolers on a tiny kids-level table. The displays are available for viewing during regular guided museum tours from 1 to 4 p.m. Tuesdays through Sundays; closed Mondays and holidays. Reservations are suggested for weekends and required for groups. Call 724-452-7341 or 888-821-4822, or visit the website

www.harmonymuseum.org.

REGIONA 28-foot-by-16-foot HO model railroad display will be running from 12:30 p.m. to 5 p.m. Saturdays and Sundays until the end of January at Donaldson Motors, 714 River Ave. Call 724-867-2293.

PITTSBURGHPhipps Conservatory and Botanical Gardens offers the Winter Flower Show and new Winter Light Garden through Jan. 6. Visitors can expect elaborate wreaths decorated by staff horticulturists and educators; an 1893 World’s Fair-themed Garden Railroad; a cheerful woodland where bears and cardinals trim a tree against a yellow moon with Santa’s silhouette; and Phipps’ own traditional cut fir decorated with thousands of LED lights. Hours are from 9:30 a.m. to 10 p.m. The light garden shines from 5 to 10 p.m. Phipps will close at 5 p.m. Monday and reopen at 9:30 a.m. Wednesday. Admission is $12 for adults, $11 for senior citizens age 62 and older and students with ID, $9 for children ages 2 to 18, and free for members and children younger than 2. Visit phipps.conservatory.org.Carnegie Science Center next to Heinz Field on the North Side, hosts Spaceplace, a permanent exhibit featuring a two-story walk-in replica of the International Space Station replica, 1/3 scale model of the Hubble telescope, and a weightlessness experience. Science Center admission is $17.95 for adults and $11.95 for children ages 3 to 12. Call 412-237-3400 or visit CarnegieScienceCenter.org for more information. Regular Science Center hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. The Science Center will be closed all day Sunday for the Steelers home game, as well as all day Tuesday for Christmas and Dec. 30 for another Steelers home game.Children’s Museum, 10 Children’s Way, Allegheny Square, is displaying “Tough Art” through Jan. 13. “Missing Links (The Rainbow Jumpy)” continues through Feb. 3. Bounce, jump, roll, run and walk through a 30-foot inflatable “jumpy” art piece on loan from The New Children’s Museum in San Diego, Calif. Regular hours are 10 a.m. to 5 p.m. daily, except major holidays. The museum will be closed on Tuesday for Christmas Day and on Jan. 1 for New Year’s Day. Hours are extended to begin at 9 a.m. through Dec. 31. Admission is $13 for adults, $12 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Call 412-322-5058 or visit www.pittsburghkids.org.The Holocaust Center of Pittsburgh and the August Wilson Center have partnered to present “The Nazi Olympics: Berlin 1936” exhibition” through Feb. 28 at the August Wilson Center, 980 Liberty Ave. Curated by the United States Holocaust Memorial Museum, the exhibition explores the issues surrounding the 1936 Olympic Games including the Nazis’ use of propaganda, the intense boycott debate, history of the torch run, and the historic performance of Jesse Owens. For tickets, call 412-421-1500, Ext. 106, or visit www.AugustWilsonCenter.org.