The Butler Public Library, 218 N. McKean St., will host "Raising Healthy Children Naturally" at 10:30 a.m. Jan. 28. The 45-minute presentation will be given by two doctors.

Child care will be available. For information, call Peter Bess at (724) 287-1715.

A teen movie night will be held from 7 to 10 p.m. Jan. 29 at the Butler Public Library, 218 N. McKean St. The film will be Harry Potter and the Half-Blood Prince. The event is open to ages 12 to 18, and parents are welcome to stay. For information, call Peter Bess at (724) 287-1715.

SANDY LAKE, Mercer County — McKeever Environmental Learning Center, 55 McKeever Lane, Sandy Lake, will host a winter tree identification workshop from 8 a.m. to 3 p.m. Friday. Participants will use McKeever's laptops and computer software to identify trees. The workshop will take place indoors and outdoors. For information, call 724-376-1022.