COUNTY

Harmony Museum, 218 Mercer St., will have its annual Harmoniefest dinner at 6 p.m. March 11 in Stewart Hall. This year’s event marks the 213th anniversary of the society’s founding, as well as the 50th anniversary of the modern commemoration of the event. Paid reservations are required by Tuesday afternoon at 724-452-7341 or hmuseum@zoominternet.net.

PITTSBURGH

Children’s Museum, Allegheny Square, will open “Measurement Rules” March 11. Hours are 10 a.m. to 5 p.m. daily. Admission is $16 for adults and $14 for children 2 to 18 and senior citizens. Visit www.pittsburghkids.org.

Heinz History Center, 1212 Smallman St., is showing “#Pixburgh: A Photographic Experience” through Aug. 20. Hours are 10 a.m. to 5 p.m. daily. Admission is $16 for adults, $14 for senior citizens, and $6.50 for children 6 to 17. Visit www.heinzhistorycenter.org.

National Aviary, 700 Arch St., is open daily from 10 a.m. to 5 p.m. Admission is $14 for adults and $13 for senior citizens and children 2 to 12. Visit www.aviary.org.

Carnegie Museum of Natural History, 4400 Forbes Ave., is showing “Amazing Butterflies” through April 23. Hours are 10 a.m. to 5 p.m. Mondays and Wednesdays through Saturdays with extended hours until 8 p.m. Thursdays and from noon to 5 p.m. Sundays. Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children 3 to 18. Visit www.carnegiemnh.org.