Big Brother BIg Sister is a youth mentoring organization. Since 1904, caring adult volunteers have been helping millions of children reach their full potential and fulfill their dreams. There are programs in all 50 states that match kids with volunteers who provide meaningful friendships and share fun experiences. Since 1966, dedicated volunteers have worked with BBBS professionals in New Hampshire to help boys and girls rise to their potential. In 2001, nearly 700 children participated in Big Brothers Big Sisters programs statewide.