Tours of Preston Park, including the residence and the grounds, will be offered at 9:30 a.m. Nov. 30, for a Thanksgiving-weekend walk. Admission is free, but registration is required and spaces are limited. Tours can also be specially arranged for groups. The park is at 415 S. Eberhart Road, Butler Township. Call 724-283-3430, Ext. 212.

Jennings Environmental Education Center, Route 528, Brady Township, will be the site of “Oawesome Opossum” at 3 p.m. Nov. 24 and “Nature Detectives: Map Mysteries” at 2 p.m. Dec. 8 (registration due by Dec. 6). Visit http://events.dcnr.pa.gov or call 724-794-6011.