COUNTY

Butler Ghost Walks take place at 7:30 p.m. Friday and Saturday. The 90-minute guided walks begin in Diamond Park opposite the county courthouse. Participants will hear about the ghosts of Butler’s past from guide Bill May. Make reservations at butlerghostwalk@gmail.com or by calling 724-256-9026. Cost is $10. Children under 18 must be accompanied by an adult.

Old Stone House at the intersection of Routes 8, 173 and 528 in Brady Township will be the site of “Spooky Stories” and Halloween festivities for all ages from 5:30 to 8:30 p.m. Friday. There will be storytelling, historical reenactments, face painting, an apple press demonstration and folk music. Admission is $5. Call 724-738-4964 or visit oldstonehousePA.org.

PITTSBURGH

Heinz History Center, 1212 Smallman St., and its Western Pennsylvania Sports Museum along with the University of Pittsburgh Press will commemorate the former Steelers coach Chuck Noll beginning at 1 p.m. Sunday. The event will include Steelers greats and serve as the launch of the new book, “Chuck Noll: His Life’s Work.” Admission is $20. Registration is available at www.heinzhistorycenter.org.

National Aviary, 700 Arch St., will host Owl-o-ween activities from 11 a.m. to 3 p.m. Saturday, included with admission of $14 for adults and $13 for senior citizens and children 2 to 12. Baby sloth Valentino birthday activities will be from 10 a.m. to 1 p.m. Sunday and Monday.

Carnegie Science Center, North Side, presents BodyWorks, a variety of medical technologies in an exhibit that examines the body. Admission is $18.95 for adults and $11.95 for children 3 to 12. Hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. Call 412-237-3400.