The Old Stone House offers tours from 10 a.m. and 5 p.m. Saturdays and noon and 5 p.m. Sundays. Admission is $3 per person or $5 per family. 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.

Phipps Conservatory and Botanical Gardens hosts its 10th annual Red, Ripe and Roasted tomato and garlic festival from 11 a.m. to 4 p.m. Sunday. The summer flower show continues through Oct. 5. Conservatory hours are 9:30 a.m. to 5 p.m. daily and until 10 p.m. Fridays. Admission is $15 for adults, $14 for senior citizens and students, and $11 for children ages 2 to 18. Visit phipps.conservatory.org.Fort Pitt Museum in Point State Park each Saturday through Aug. 30 will host Summer Saturdays 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.Carnegie Science Center, North Side, presents the exhibit “Blue!” through Jan. 1. In conjunction, blues and bluegrass performances will be held at 1 p.m. Saturdays through Aug. 30. Performances are free with general admission of $17.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org.Heinz History Center, 1212 Smallman St., presents “Pittsburgh's Lost Steamboat: Treasures of the Arabia,” through Jan. 4. Center admission is $15 for adults, $13 for senior citizens, and $6 for students and children ages 6 to 17. Visit www.heinzhistorycenter.org.ToonSeum, 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.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.orgChildren's Museum, 10 Children's Way, Allegheny Square, hosts “XOXO: An Exhibit About Love and Forgiveness” through Aug. 31. 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. 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.