Butler County Historical Society's Senator Walter Lowrie House Museum is open 9 a.m. to 4 p.m. Tuesdays through Fridays. Call 724-283-8116 or visit www.butlerhistory.com.

Mars Shortline Railroad has tiny train rides available. As long as weather allows, adults and children can catch rides from 10 a.m. to 2 p.m. Fridays and 1 to 4 p.m. Saturdays through September at the Mars History and Landmark Society's restored small scale B&O Train Station south of downtown at 1 Brickyard Road. Rides are free. Donations are accepted. Call 724-272-9588 or visit marshistory.org.

The Old Stone House presents “Foodways Programs” cooking instruction. Classes run 10 a.m. to 2 p.m. Bake oven classes are available Saturday and Sept. 19. Open hearth cooking classes are Sept. 12 and Oct. 10. Cost is $35 each, with a two-week advance registration required. Visit http://oldstonehousepa.org/tasteofhistory. The Old Stone House, at the intersection of Routes 8, 528, and 173 in Brady Township, is owned and operated by Slippery Rock University.

Harmony Museum, 218 Mercer St., Harmony, will have a weaving make it-take it class Saturday at its 210-year-old log house at 245 Mercer St. Cost is $20. Registration is by e-mail at harmonyweavers@gmail.com.

Oil Creek & Titusville Railroad has train rides Wednesdays, Thursdays, Saturdays and Sundays in August. The train leaves the Perry Street Station, 409 S. Perry St., Titusville, at 1 p.m. Plan to arrive at least one half-hour prior for boarding. On the three-hour trip, guests can learn about the people and places where oil history began. Tickets are $35 for first class. Coach is $19 for adults, $17 for seniors, and $13 for children ages 3 to 12. Call 814-676-1733.

Carnegie Science Center, North Side, hosts the art, comedy, and science of Casey Carle's BubbleMania on Saturday and Sunday. Thirty-minute shows at noon, 2 and 4 p.m. are included with general admission. Center hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. General admission is $18.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org.Heinz History Center, 1212 Smallman St., hosts through Aug. 20 rare artifacts and photographs from the Pittsburgh Police Historical Collection highlighting the local founding of the FOP in 1915. Center admission is $15 for adults, $13 for seniors, and $6 for children ages 6 to 17. Active duty and retired military pay $6. Visit www.heinzhistorycenter.org.Fort Pitt Museum, Point State Park, has opened the exhibit “Captured by Indians.” Hours are 10 a.m. to 5 p.m. daily. Admission is $6 for adults, $5 for senior citizens, $3 for children ages 6 to 17 and for retired and active military. Visit www.heinzhistorycenter.org.Phipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, continues the Summer Flower Show through Oct. 5. The Butterfly Forest is open through Sept. 7. Hours are 9:30 a.m. to 5 p.m. daily, and until 10 p.m. Fridays. Admission is $15 for adults; $14 for students and senior citizens; and $11 for children ages 2 to 18. Call 412-622-6914.National Aviary, 700 Arch St., presents the Condor Court. Outdoor show “Soar!” runs at 3 p.m. daily. Aviary hours are 10 a.m. to 5 p.m. daily and admission is $14 for adults, $13 for senior citizens and $12 for children ages 2 to 18; shows are extra. Visit www.aviary.org.Children's Museum, Allegheny Square, presents “Very Eric Carle: A Very Hungry, Quiet, Lonely, Clumsy, Busy Exhibit” through Sept. 20. Museum 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, through Jan. 4 will exhibit “Out of This World! Jewelry in the Space Age.” “Animal Secrets” continues through Jan. 10. Visit www.carnegiemnh.org.