Henry Winkler, who gained popularity for his role as Fonzie on the television. show "Happy Days", will present the keynote address at the AAP Spring Session in San Francisco. While Winkler is best know as an actor, producer and direct, he also is deeply involved with advocacy efforts for children. His involvement includes serving as national chairman of the annual Tays for Tots campaign and numerous teenage alcohol and drug abuse programs. In 1985, his production company teamed with Paramount Home Video to produce "Strong Kids, Safe Kids." The 40-minute. videotape, which Winkler hosted, instructs parents and children about child abuse and abduction.