Harmony Museum on Mercer Street in Harmony, representing the town founded in 1804 by pacifist German Lutheran Separatists and their Harmony Society, displays the annual Yobp-Eckstein log house village and toy railroad display in the Wagner House museum annex through early January. Regular guided tours are offered from 1 to 4 p.m. daily except Mondays and holidays; reservations are suggested for weekends and required for groups. Call 724-452-7341 or 888-821-4822, or visit the Web site, www.harmonymuseum.org.

<B>Carnegie Science Center</B>, One Allegheny Ave. next to Heinz Field on the North Side, will be closed on Sunday due to the Pittsburgh Steelers playoff football game taking place next door at Heinz Field. Ongoing displays include the Miniature Railroad & Village. Regular hours are 10 a.m. to 7 p.m. Fridays and Saturdays and from 10 a.m. to 5 p.m. Sundays through Thursdays; closed holidays. Regular admission is $14 for adults and $10 for senior citizens age 62 and older and children 3 to 18. Parking is $3. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.<B>National Aviary</B>, 700 Arch St., will offer free admission and special penguin encounters and activities throughout the day on Monday in celebration of Sidney the penguin's first birthday. Visitors will also have the opportunity to learn about the Aviary's new open-air African penguin exhibit, Penguin Point, under construction and expected to be finished by late spring. Regular hours are 10 a.m. to 5 p.m. daily except Christmas Day. Regular admission is $10 for adults; $9 for senior citizens; $8.50 for children ages 2 to 12; and free for children younger than 2. Call 412-323-7235 or visit the Web site, www.aviary.org.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, will host special activities Monday, in honor of Martin Luther King Jr. Day, including a bake sale, dance and violin performances, and an idea for a volunteer project. The exhibit "Tough Art" concludes on Sunday. Regular hours are 10 a.m. to 5 p.m. Mondays to Saturdays; and noon to 5 p.m. Sundays. Admission is $9 for children 2 to 18 and senior citizens and $10 for adults; children younger than 2 are admitted free. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org.<B>Phipps Conservatory and Botanical Gardens</B> in Schenley Park is displaying among the plants some Donald M. Robinson photographs of the Chihuly glass that was exhibited at Phipps last year. The photography will be shown through Jan. 22. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. on Fridays. Admission rates are $10 for adults, $9 for seniors age 62 and older and students with ID, and $7 for children ages 2 to 18. Phipps members and children under 2 are admitted free. Call 412-622-6914 or visit www.phipps.conservatory.org.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave. in Oakland, continues "Dinosaurs in Their Time." Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, with additional hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Closed major holidays. Admission, which includes the Carnegie Museum of Art, is $15 for adults, $12 for senior citizens, and $11 for students and children age 3 and older, and free for members and children younger than 3. Call 412-622-3131 or www.carnegiemnh.org.<B>Heinz History Center</B>, 1212 Smallman St., features its new exhibit, "Pittsburgh: A Tradition of Innovation," tracing Western Pennsylvania's imprint on the United States and the world. From the Meadowcroft Rockshelter in Avella, Pa., 16,000 years ago to the roads, planes and houses of today, the long-term exhibition features people's stories. Hours are 10 a.m. to 5 p.m. daily, except holidays. Admission is $9 for adults, $7 for senior citizens older than 61, $5 for students with ID and for children ages 6 to 18, and free for children younger than 6. Call 412-454-6000.