COUNTY

Jennings Environmental Education Center, Route 528, Brady Township, will host Nature Detectives: Crayfish Capers from 2 to 4 p.m. May 17. The Nature Detectives series is designed for families with children age 6 and older. Participants should dress appropriately for the weather and expect to participate in an outdoor learning adventure, rain or shine. Registration is required by May 8. Register by calling 724-794-6011.

REGION

Star parties sponsored by the Amateur Astronomers Association of Pittsburgh are scheduled to begin, weather permitting, at 8:10 p.m. Friday and Saturday at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park, Frazer Township, Allegheny County. Call 724-224-2510.