The Old Stone House will host an Open Hearth Cooking and Bake Oven combined class Saturday and Aug. 16. Cost for each course is $35, with registration required at oldstonehousepa.org/tasteofhistory. Call 724-738-2409. The Old Stone House is at the intersection of Routes 8, 173 and 528 in Brady Township and has tours from 10 a.m. to 5 p.m. Saturdays and noon to 5 p.m. Sundays. The site is operated by Slippery Rock University.

Harmony Museum, 218 Mercer St., Harmony, offers the Flags of Freedom exhibit through July. Guided tours are offered 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.

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.Phipps Conservatory and Botanical Gardens hosts the summer flower show with themed railroad displays 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.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. Call 412-454-6000 or visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., presents “Taking Flight: An Aerial Adventure” at 11 a.m. and 2 p.m. daily 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. Call 412-323-7235 or visit www.aviary.orgCarnegie Science Center, North Side, continues its Big Blue Summer with Blue Moon Weekend July 19 and 20. 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.