Developed in response to requests from a variety of family support professionals, teachers, and parents, this sourcebook offers information on preventing violence in children at different stages of development. The introduction provides a rationale for the development of this sourcebook, discusses parental influence, and describes how parents can use this guide. The sourcebook is organized to offer access to information on the three primary developmental stages in childhood: the early years (birth to 5 years), middle childhood (6 to 12 years), and adolescence (13 to 18 years). Within each section are subsections that give an overview of development during that stage and that identify some of the issues affecting violence in children and over which parents have significant control. In addition, each subsection is summarized as a one-page handout for parents; these summary sheets are designed for photocopying as workshop handouts. Topics discussed in the early years section include brain development and infant attachment, impulse control, prosocial skills, violence on television and other media, toys that promote violent behavior, early childcare experiences, and managing family conflict. Areas highlighted in middle childhood include peer relationships, popular entertainment media, after-school care and monitoring, school success, conflict management, and caring connections. Topics discussed in the adolescent section include activities and volunteerism, substance abuse, access to weapons, peer influences, dating relationships, and transitions from adolescence to young adulthood. Each section contains references. The guide also includes links to a large on-line appendix with longer articles supplementing the various subsections that can be accessed through the National Parent Information Network web site. (KB)