The purpose of this 3-year, multi-site evaluation research was to examine the effectiveness of farm safety day camps organized and delivered through five Farm Safety 4 Just Kids (FS4JK) chapters in different regions of the nation. The locations of the chapters included in the study encompassed a variety of agricultural commodities and farm compositions. The specific aim was to evaluate whether the camps positively influenced: (1) children's knowledge about farm safety and health, their safety attitudes, and subsequent safety behaviors; and (2) parents' attitudes and behavior toward children's farm safety behavior. In addition, the effect of the camps on the local community was assessed. This research was grounded in the social-ecological framework of McLeroy and colleagues (1988) and in the National Institute for Occupational Safety and Health Training Intervention Effectiveness Research (TIER) Model. A multi-level mixed-method evaluation strategy that combines both quantitative and qualitative data collection methods was used to examine the long-term effects of the day camps on children, their families, and their communities. A quasi-experimental, no-control-group, pretest-posttest design with repeated measures was used. Data were collected from children and their parents (guardians) over 18 months following children's camp experience. Results indicate children gained knowledge about selected farm safety topics and changed safety behavior. Parents also indicated benefits from their children's camp experience. Instructional practices at the camps were appropriate. Some effect, though limited, was noted in the larger community. The partnership of local FS4JK Chapters, the North American Farm Safety 4 Just Kids organization, and the University of Kentucky provided a unique approach to examining the effectiveness of FS4JK day camps. The evaluation results can be used to assist FS4JK with refinements of future programs and will assist camp leaders in articulating their theoretical framework, goals, and objectives of the day camps. The findings also will contribute to the national research agenda in farm child safety knowledge, attitudes, behavior, and injury rates.