Moon -- The parks and recreation department will offer four weeks of tennis lessons for children and youth on Fridays from July 17 to Aug. 7 at Moon Park.

• Ages 7-10, 10 to 11 a.m.

• Ages 11-14, 11 a.m. to noon.

The cost is $60 per person per session, $50 for residents. Call 412-262-1703.

Ambridge -- Good Samaritan Catholic Church, 725 Glenwood Ave., will hold a pierogi sale from 8 a.m. to 3 p.m. tomorrow. To order, call 724-266-6010 after 7 a.m. tomorrow.

South Fayette -- The South Fayette Library, 515 Millers Run Road, will hold the following activities:

• "Game Night -- The 39 Clues: Double Cross Tabletop Game," for students grades 5-8, 6:30 to 7:30 p.m. today and July 23.

• Chess camp, for students up to grade 8, 1 to 3 p.m. Monday through July 10. Family costs: $30 for one child, $45 for a second child and $60 for a third child.

For information, call the library, 412-257-8660.