Harmony Museum, 218 Mercer St., Harmony will host an antique gun show Saturday with an array of guns, swords and accouterments, many for sale. The weapons and other items are representative of the type that contributed to settlement of the “Ohio Country.” Displays comprise primarily civilian and military long arms and pistols, with emphasis on the American longrifle. Hours are 9 a.m. to 4 p.m. in Stewart Hall. Admission is $5, with proceeds benefiting museum operations. Call 724-452-7341.

Heinz History Center, 1212 Smallman St., presents “Pennsylvania's Civil War” featuring 150 artifacts, six lifelike museum figures, and a 26-foot Rodman cannon, through Jan. 5. Admission to the exhibit is included with the regular admission of $15 for adults, $13 for senior citizens, $6 for students and children ages 6 to 17, and free for children age 5 and younger. Call 412-454-6000 or visit www.heinzhistorycenter.org.Children's Museum, 10 Children's Way, Allegheny Square, is showing “Adventures with Clifford the Big Red Dog” through Sept. 1. Hours are 10 a.m. to 5 p.m. daily. Admission is $13 for adults, $12 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Call 412-322-5058 or visit www.pittsburghkids.org.Phipps Conservatory and Botanical Gardens, 1 Schenley Park, hosts Farmers at Phipps from 2:30 to 6:30 p.m. Wednesdays through the last week of October. The Butterfly Forest continues through Sept. 2, and the summer flower show: Glass in the Gardens runs through Oct. 6. Conservatory hours are 9:30 a.m. to 5 p.m. daily and until 10 p.m. on Fridays. Conservatory 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.ToonSeum, Pittsburgh's Museum of Cartoon Art at 945 Liberty Ave., is exhibiting seven decades worth of original art representing cartooning's highest honor, The Reuben Award, through Sunday. Works from artists such as Gary Larson of “The Far Side” and Charles M. Schulz of “Peanuts” are displayed. Hours are 10 a.m. to 3 p.m. Mondays, Wednesdays, Thursdays and Sundays and 10 a.m. to 5 p.m. Fridays and Saturdays. Admission is $1 for children ages 6 to 12 and $5 for adults. Call 412-232-0199 or visit www.toonseum.org.National Aviary, 700 Arch St., has opened “Talons!” featuring birds of prey showing daily at noon and 2:30 p.m. The show is $5 in addition to the regular cost of admission, which is $13 for adults, $12 for senior citizens, $11 for children ages 2 to 18, and free for children younger than 2. Call 412-323-7235 or visit www.aviary.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, presents “Roads of Arabia: Archaeology and History of the Kingdom of Saudi Arabia” through Nov. 3. More than 60 fine art jewelry pieces inspired by nature are on display in “Garden of Light: Works by Paula Crevoshay” through Sunday. Hours are 10 a.m. to 5 p.m. Tuesdays to Saturdays, with extended hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Admission is $17.95 for adults, $14.95 for senior citizens, and $11.95 for students with ID and children ages 3 to 18. Admission after 4 p.m. on Thursdays is $10 per adult/senior citizen and $5 per student/child. Call 412-622-3131 or visit www.carnegiemnh.org.