The Old Stone House offers tours 10 a.m. to 5 p.m. Saturdays and noon and 5 p.m. Sundays. Admission is $3 per person or $5 per family. A demonstration on open hearth cooking will be held there Sept. 13; bake oven, Sept. 20; and a harvest dinner, Oct. 18. Cost for each course is $35, with advance registration required at oldstonehousepa.org/tasteofhistory. The historic site at the intersection of Routes 8, 173 and 528 in Brady Township is owned and operated by Slippery Rock University. Call 724-738-2409.

Harmony Museum, 218 Mercer St., Harmony, offers guided 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 ages 6 to 17.

Fort Pitt Museum in Point State Park will host a Summer Saturday at the Fort, which is included in the regular admission of $6 for adults, $5 for senior citizens, and $3 for children ages 6 to 17, students and the military. Visit www.heinzhistorycenter.org.Heinz History Center, 1212 Smallman St., presents “Pittsburgh's Lost Steamboat: Treasures of the Arabia.” Center admission is $15 for adults, $13 for senior citizens, and $6 for children ages 6 to 17. Visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., presents “Taking Flight: An Aerial Adventure” daily at 11 a.m. and 2 p.m. in the rose garden, free with regular admission of $14 for adults, $13 for senior citizens and $12 for children ages 2 to 18. Hours are 10 a.m. to 5 p.m. daily. Visit www.aviary.orgToonSeum, 945 Liberty Ave., presents “Cartoons are the Best Medicine: The Healing Humor of Dan Piraro,” an exhibition featuring 20 Bizarro cartoons on health and the medical profession, through Nov. 2. 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. Visit toonseum.org.Children's Museum, 10 Children's Way, Allegheny Square, hosts “XOXO: An Exhibit About Love and Forgiveness” through Sunday. Admission is$14 for adults and $13 for children ages 2 to 18 and senior citizens. Hours are 10 a.m. to 5 p.m. daily. Visit www.pittsburghkids.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, presents “Race: Are We So Different?” through Oct. 27. Hours are 10 a.m. to 5 p.m. Mondays and Wednesdays through Saturdays and noon to 5 p.m. Sundays with extended hours until 8 p.m. Thursdays. Admission is $17.95 for adults, $14.95 for senior citizens, and $11.95 for children ages 3 to 18. Admission after 4 p.m. Thursdays is discounted. Visit www.carnegiemnh.org.Carnegie Science Center, North Side, hosts a program in which personnel from Seven Springs resort will teach kids how to snowboard from 11 a.m. to 3 p.m. Sept. 6. Snowboards and boots in sizes 10 to 13 will be available. Learn to Snowboard is included with general admission of $17.95 for adults and $11.95 for children ages 3 to 12. Call 412-237-3400. The center is closed Sept. 2, 7 and 28.