Butler County Historical Society's Senator Walter Lowrie House Museum isclosed in October to set up a Civil War in Pennsylvania exhibit.

The Old Stone House hosts its “Spooky Stories” Halloween festivities from 5:30 to 8:30 p.m. Oct. 22 and 23 with storytelling by Joanna Demarest, Alan Irvine, and Marsha Wong. Festivities will include historical reenactments and family-focused activities. The program Oct. 23 will include the annual costume contest for children 10 and younger. Admission is $5 for adults and $3 for children, but no more than $15 for a family. The Old Stone House at the intersection of Routes 8, 173 and 528 is owned and managed by Slippery Rock University. Call 724-738-2409 or visit www.oldstonehousePA.org.

Harmony Museum, 218 Mercer St., will host its annual Pumpkin Pancake Brunch Oct. 18 from 9 a.m. to 1:30 p.m. in Stewart Hall. Cost is $10 for adults and $7 for children under 10. Guided museum tours are available from 1 to 4 p.m., for which admission is charged.

National Aviary, 700 Arch St., features creatures of the night at Owl-O-Ween, its annual harvest festival celebration, from 11 a.m. to 3 p.m. Oct. 17, 24, and 31. Call 412-258-9445 to register.Heinz History Center, 1212 Smallman St., presents the “We Can Do It!” WWII exhibit. Center admission is $15 for adults, $13 for seniors, and $6 for children ages 6 to 17. Admission for active and retired military is $6. Visit www.heinzhistorycenter.org.ToonSeum, Pittsburgh's Museum of Cartoon Art, 945 Liberty Ave., hosts “Drawn in Pittsburgh” through Oct. 18. Admission is $8 for those over 13 and $4 for those 6 to 12. Senior citizens, college students, veterans and active military pay $7. Visit toonseum.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, presents the exhibits “Out of This World! Jewelry in the Space Age,” and “Animal Secrets.” Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children ages 3 to 18. Free admission from 3 to 8 p.m. Thursdays in October is made possible by UPMC Health Plan. Visit www.carnegiemnh.org.Children's Museum, Allegheny Square, is open 10 a.m. to 5 p.m. daily. Admission is $14 for adults and $13 for children ages 2 to 18 and senior citizens. Visit www.pittsburghkids.org.