The Norwalk-Ontario-Wilton School District will host Christmas concerts next month. The N-O-W Elementary School concert will be at 7:30 p.m. Tuesday, Dec. 3, in the Falcon Gym. Third- through sixth-graders will present “Melton the Warm-Hearted Snowman,” plus the elementary bands will perform. The Brookwood Junior and Senior High School concert will be at 7:30 p.m….