Ensuring the safety of children, taking into account the growing threats of a terrorist nature, is an important component of modern preschool education. At the same time, while conducting classes on anti-terrorist security, it is important to observe psychological and pedagogical vigilance towards the emotional state of children. The aim of the research is to develop a method of sand art-diagnostics of the emotional response of senior preschool children to information about anti-terrorist security. The study uses the materials based on the data obtained by the authors' experience, a sand tablet with sand for animation, the author's method describing the course of the study. Methods: observation, descriptive, statistical. The article discusses the author's diagnostic method (sand art diagnostics) as a unique technique for screening the most common options for the emotional response of children to information about anti-terrorist security. It was determined that the method of sand art diagnostics has practical significance, namely, the ability to identify the most possible adverse emotional reactions of older preschool children to information about safe behavior under terrorist threats. The method can be used by any specialists from the field of pedagogy and psychology (educators, psychologists, social workers, teachers of additional education, etc.), who can for the first time notice the deviating response in a child: passivity, obsessive curiosity, anxiety. The results of the study included statistically verified data on the emotional response of children, recommendations for the use of the author's method in the practice of teachers. As a result of the described research, the team of authors developed a diagnostic method, on the basis of which a computer program was created to automate the process of calculating the probability of a child's response type.