Objective: to assess the knowledge, attitude and practice of family members of preschool children about regional food,through a survey before and after an educational intervention. Methods: this is a pre-experimental one-group pretest–posttest study, with 62 family members of preschool children. One month before and after the conduction of an educationalactivity using the flipchart “regional food promoting food security”, one applied the survey. Results: it was found that after theeducational strategy, there was an increase in the classification “appropriate” in each survey area about regional food, and thevariation of knowledge (17.7%-77.4%), attitude (21%-72.6%) and practice (14.5%-64.5%), consequently, an improvementof 59.7% in knowledge, 51.6% in attitude and 50% in practice. Conclusion: the use of educational technology had a positiveinfluence on the knowledge, attitudes and practice of family members, contributing thus to the health promotion of childrenand their family members.