A study to determine the effectiveness of a comprehensive health education curriculum developed for Head Start, "Hale and Hardy's Helpful Health Hints," shows that the program appears to favorably affect the health knowledge of the children in the sample, and that the picture identification instrument format is appropriate for the preschool child. Seventy-three experimental subjects and 35 control subjects, all 4- and 5-year olds from two Kentucky Head Start centers, were given a modified version of the testing instrument used in the Longitudinal Study of the Primary Grades Health Curriculum Project. The pretest/posttest consisted of 30 statements; after each one was read, the child was shown 3 pictures and asked to point to the one that corresponded to the given statement. Those children exposed to the health curriculum scored significantly higher in health knowledge acquired. A need for replication of the study in other locations is indicated. (DG)