The mission of Big Brothers Big Sisters (BBBS) is to provide children facing adversity with strong andenduring, professionally supported one-to-one relationships that will change their lives for the better,forever. As the nation’s largest donor and volunteer supported mentoring network, Big Brothers Big Sistersmakes meaningful, monitored matches between adult volunteers (€œBigs€) and children (€œLittles€), ages 6through 18, in communities across the country.