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

REGION

For the 20th year, a model railroad is on display from 12:30 to 5 p.m. Saturdays and Sundays through Feb. 1 at Donaldson Motors, 714 River Ave., Emlenton. The HO scale railroad covers an area that is more than 28 feet by 16 feet. Lionel trains and Thomas the Tank Engine are also on display. Admission is free. Call 724-867-2293.

Phipps Conservatory and Botanical Gardens, 1 Schenley Park, hosts the annual Orchid and Tropical Bonsai Show starting Saturday. Featuring orchids planted in garden beds and hanging baskets, the show continues through March 9. Public programs, free with paid admission, will take place on select Saturdays and Sundays at 1:30 p.m. in the Tropical Forest Conservatory. Additionally, bonsai classes are available through Phipps' adult education program. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. Fridays. 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.Carnegie Science Center, North Side, will host Conservation Day featuring environmentally-themed programming on Monday. Thanks to Duquesne Light's sponsorship, visitors will enjoy free general admission, a free Omnimax film, and free parking Monday, subject to availability. The center will be open from 10 a.m. to 5 p.m. Call 412-237-3400 or visit CarnegieScienceCenter.org.National Aviary, 700 Arch St., has daily baby penguin meet-and-greets and a Birds on Film Weekend from Saturday through Monday. The “Canary's Call” exhibit showcases four signature bird species. Admission is $13 for adults, $12 for senior citizens, $11 for children ages 2 to 18, and free for children younger than 2. Hours are 10 a.m. to 5 p.m. daily. Call 412-323-7235 or visit www.aviary.org.Children's Museum, 10 Children's Way, Allegheny Square, will celebrate the life of Dr. Martin Luther King Jr. with special activities Monday. TapeScape, a massive indoor landscape made of 360 rolls (that's 22 miles!) of packing tape, concludes Sunday. Hours are 10 a.m. to 5 p.m. daily. 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.ToonSeum, Pittsburgh's Museum of Cartoon Art at 945 Liberty Ave., presents “Color Me Happy: '50s Coloring Book Illustrations as Modern Memes” Jan. 24 through March 16. “Wonder Women: On Page and Off” runs through March 30. Hours are 10:30 a.m. to 3:30 p.m. Mondays, Wednesdays and Thursdays, 10:30 a.m. to 7 p.m. Fridays, 10:30 a.m. to 5 p.m. Saturdays and 11 a.m. to 5 p.m. Sundays; closed Tuesdays. Admission is $6 for those over age 13 and $3 for children ages 6 to 12. Senior citizens, college students, veterans and active military pay $5. Call 412-232-0199 or visit toonseum.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. Admission is $15 for adults, $13 for senior citizens, and $6 for students and children ages 6 to 17. Call 412-454-6000 or visit www.heinzhistorycenter.org.