Big Brothers Big Sisters operates under the belief that inherent in every child is the ability to succeed and thrive in life. We are committed to helping children access their own resourcefulness and their own resiliency in order to realize their fullest potential. As the nation’s largest donor and volunteer-supported mentoring network, Big Brothers Big Sisters makes meaningful, monitored matches between adult volunteer mentors (“Bigs”) and children (“Littles”), ages 5 through 18.