THIS MULTI-DISCIPLINARY, MULTI-INSTITUTIONAL, MULTI-STATE, INTEGRATED RESEARCH, EDUCATION, AND EXTENSION PROJECT WILL ADVANCE AND EXPAND THE PROGRESS OF HOMESTYLES TOWARD REDUCING RISK OF CHILDHOOD OVERWEIGHT AND OBESITY. HOMESTYLES, AN IN-HOME FAMILY INTERVENTION, ENABLES AND MOTIVATES ENGLISH- AND SPANISH-SPEAKING PARENTS TO SHAPE HOME ENVIRONMENTS AND WEIGHT-RELATED LIFESTYLE PRACTICES TO PREVENT CHILDHOOD OBESITY. SEGMENT 1 OF HOMESTYLES FOCUSED FAMILIES WITH PRESCHOOLERS (AGES 2-5). THIS RENEWAL PROJECT WILL GENERATE NEW KNOWLEDGE ABOUT HOW PARTICIPATION IN HOMESTYLES-SEGMENT 1 LONGITUDINALLY AFFECTS WEIGHT-RELATED ASPECTS OF HOME ENVIRONMENTS AND LIFESTYLE PRACTICES. THIS PROJECT ALSO WILL CONDUCT A DISSEMINATION FEASIBILITY STUDY TO DETERMINE HOW TO EFFECTIVELY DIFFUSE THE INNOVATIONS OF THE EVIDENCE-BASED HOMESTYLES-SEGMENT 1 INTERVENTION TO PARENTS OF CHILDREN ENROLLED IN PRESCHOOL. THIS PROJECT WILL CREATE A NOVEL, CULTURALLY-COMPETENT HOMESTYLES-SEGMENT 2 RESPONSIVE TO THE DEVELOPMENTALLY UNIQUE NEEDS OF MIDDLE CHILDHOOD (6-11 YEARS) AND DELIVER IT ONLINE AND IN SNAP-ED SESSIONS. FURTHER, THIS PROJECT WILL BUILD THE EXPERTISE OF THE NEXT GENERATION OF NUTRITION AND HEALTH EDUCATION PROFESSIONALS IN CREATING EFFECTIVE CHILDHOOD OBESITY PREVENTION PROGRAMS THROUGH FORMAL COURSEWORK AND HANDS-ON PRACTICUMS. A MULTIFACTORIAL APPROACH IS USED BECAUSE DIET, EXERCISE, AND SLEEP ARE ASSOCIATED WITH CHILDHOOD OBESITY RISK AND SUCCESSFUL RESULTS ARE LIKELY TO BE GENERATED BY ADDRESSING MULTIPLE LIFESTYLE PRACTICES IN A FAMILY CONTEXT. THIS INTERVENTION WILL APPLY COMMUNITY-BASED PARTICIPATORY RESEARCH PRINCIPLES AND BE ALIGNED WITH CURRENT OBESITY PREVENTION RECOMMENDATIONS AND BEHAVIOR CHANGE THEORIES. THIS PROJECT WILL PROVIDE A SUSTAINABLE MODEL FOR CONFRONTING AND COMBATING OBESITY AND SAFEGUARDING HEALTH THAT CAN BE BROUGHT TO SCALE NATIONWIDE.