Members of the Children's Festival Chorus perform during a recent concert. The chorus, including several Butler County students, will present its annual winter concert at 4 p.m. Sunday at First Presbyterian Church of Pittsburgh. The group of more than 150 singers includes Alexis Barbati of Prospect; Emily Bintrim and sisters Jane and Julia Vandrak, all of Harmony; Jacob McKissock of Zelienople; Rhianon Vaughn of Butler; and Chelsey Werner of Mars. For more information, call 412-394-3353.