COUNTY

The Old Stone House will host “Homebrewed History: German Beer and the Purity Law of 1516” from 2 to 4 p.m. March 25. Demonstrations of the brewing process and light hors d’oeuvres will also be provided. The Old Stone House is at the intersection of Routes 8, 173 and 528. Tickets are $25 and available by calling 724-738-4964.

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

PITTSBURGH

Carnegie Science Center, North Side, hosts a St. Patrick’s Day Sky Watch on Saturday and Astronomy Weekend March 25 and 26. Center admission is $18.95 for adults and $11.95 for children 3 to 12. Regular hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. Visit CarnegieScienceCenter.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.

Children’s Museum, Allegheny Square, presents “Measurement Rules” through May 7. 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.

Carnegie Museum of Natural History, 4400 Forbes Ave., is showing “Amazing Butterflies” through April 23. Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children 3 to 18. Visit www.carnegiemnh.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.