The Keystone Squares dance club will host free square dance lessons from 8 to 10 p.m. Sept. 13 and 20 at the YWCA, 120 W. Cunningham St.

The events are open to participants ages 13 and older. For more information, call 724-283-3196.

HARMONY — The Harmony Museum will host its second Made in Western Pennsylvania show for antiques and antique firearms Saturday and Sunday.Antiques will be displayed in the barn at 303 Mercer Road.Firearms an accessories will be displayed in Stewart Hall.The show will be open from 9 a.m. to 4 p.m. Saturday and 10 a.m. to 4 p.m. Sunday. Admission is $5 per person.For information, call 724-452-7341 or visit www.harmonymuseum.org.

A flea market and bake sale will be held from 9 a.m. to 3 p.m. Saturday at St. Peter Roman Catholic Church, 127 Franklin St.

SLIPPERY ROCK — Slippery Rock Area Parks and Recreation will host a first aid and CPRclass from 6 to 10 p.m. Aug. 28 and 30 at Slippery Rock Park.Cost is $55 per person and participants completing the course will receive American Red Cross certification in first aid and adult, child and infant CPR.For more information, call the park office at 724-794-8180 or 724-794-8181.

PINETWP — Senator Jane Orie, R-40th, will host a Child Internet Safety Forum from 6 to 8 p.m. Tuesday at Northway Christian Community Church, 12121 Perry Highway.Speakers will include Pennsylvania Attorney General Tom Corbett, FBISpecial Agent Bill Shore, Assistant U.S. Attorney Tina Miller, Bellevue Police Chief Michael Bookser, Mary Dolan of the Center for Schools and Communities and Tim Haney of the Regional Computer Crimes Task Force.

The following family reunions have been planned:<B>The Hovis/Hofius</B> family will meet for a reunion at 1 p.m. Sunday at the Community Park in Clintonville.A potluck lunch will begin at 2 p.m. Soft drinks will be provided. A business meeting and genealogy update will follow.Participants should take a well-filled picnic basket.<B>The Oesterling family </B>has planned two reunions during August.Descendents of Peter Oesterling will gather Aug. 12 at the family's Summit Township homestead.The family of Adam Oesterling will meet Aug. 20 at Butler Memorial Park.<B>Descendents of Al and Maggie Ritts</B> will gather for a family reunion Aug. 20 at Hughes Park in Emlenton.Lunch will begin at 1 p.m. Participants should take a dish to share.