The Old Stone House has public tours from 10 a.m. to 5 p.m. Saturdays and noon to 5 p.m. Sundays through Oct. 26. The Old Stone House at the intersection of Routes 8, 173 and 528 is operated by Slippery Rock University. Call 724-738-2409.

Harmony Museum, 218 Mercer St., Harmony, offers guided tours 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. Call 724-452-7341 or visit www.harmonymuseum.org.

Meadowcroft Rockshelter and Historic Village, 401 Meadowcroft Road, Avella, Washington County, is open for the season. An atlatl competition will be held June 21 and an Independence Day celebration July 4. In May, Meadowcroft is open noon to 5 p.m. Saturdays and 1 to 5 p.m. Sundays. Admission is $12 for adults, $11 for senior citizens, and $6 for children ages 6 to 17. Call 724-587-3412.

Phipps Conservatory and Botanical Gardens presents its May Market on the front lawn for a plant sale from 9:30 a.m. to 7 p.m. Friday and 9:30 a.m. to 5 p.m. Saturday. Admission to the May Market is free. The summer flower show opens Saturday with themed railroad displays. 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. Call 412-622-6914 or visit phipps.conservatory.org.Heinz History Center, 1212 Smallman St., is showing “Pittsburgh's Lost Steamboat: Treasures of the Arabia.” Center admission is $15 for adults, $13 for senior citizens, and $6 for students and children ages 6 to 17. Call 412-454-6000 or visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., will host a Bald Eagle tour at 9 a.m. May 17; cost is $35 for nonmembers. The tour will show both the bald eagles inside the aviary and the ones at the Hays nest site. An Eagles of the World Weekend is planned from 11 a.m. to 3 p.m. May 17 and 18. Call 412-323-7235 or visit www.aviary.org.ToonSeum, Pittsburgh's Museum of Cartoon Art at 945 Liberty Ave., hosts a read along party from 4 to 7 p.m. May 17. The exhibit about the children's book series “Little Golden Books” continues through June 30. Hours are 10:30 a.m. to 3:30 p.m. Mondays, Wednesdays and Thursdays, 10:30 a.m. to 7 p.m. Fridays, 10:30 a.m. to 5 p.m. Saturdays and 11 a.m. to 5 p.m. Sundays; closed Tuesdays. 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. Call 412-232-0199 or visit toonseum.org.Children's Museum, 10 Children's Way, Allegheny Square, hosts “XOXO: An Exhibit About Love and Forgiveness” through Aug. 31. The museum is open 10 a.m. to 5 p.m. daily. Admission is $13 for adults and $12 for senior citizens and children ages 2 to 18. Call 412-322-5058 or 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. Closed Tuesdays. Admission is $17.95 for adults, $14.95 for senior citizens, and $11.95 for students and children ages 3 to 18. Admission after 4 p.m. on Thursdays is discounted. Call 412-622-3131 or by visiting www.carnegiemnh.org.