The intervention group refers to the group that will the "Food Hunter" board game intervention developed by the researchers to enable children to recognize healthy and unhealthy foods; to learn what vitamins and minerals are necessary for children in the growth and development period, their effects on our health and in which foods they are found.

The control group refers to the group that will not receive any nutrition education intervention.

Food Hunter board game intervention, which includes various nutrient cards and question cards and is played with pawns and dice, will be played with children for approximately 4 weeks, one day a week and one session (40 minutes) with the researcher dietitian. By talking about the nutrients in the game on the game cards, children will be able to recognize the nutrients and important points will be emphasized for the participants with the answers to the cards containing various questions about healthy nutrition.

It was developed to measure children's habit of consuming low-fat/salt foods in contrast to high-fat/salt food options. A validity and reliability study was conducted (Cronbach's alpha coefficient 0.68). The items of the scale consisting of 14 questions with 2 options take a value of -1 for unhealthy food and +1 for healthy food and the total score varies between -14 and +14. A high total score on the scale indicates healthy eating habits.

It was developed to measure children's self-confidence to choose low-fat and low-salt foods despite the fatty and salty food options. A reliability and validity study was conducted (Cronbach's alpha coefficient 0.79). It is a 3-point Likert-type scale consisting of 15 items. Scale items can be scored between -1 and +1 (-1: not sure, 0: somewhat sure, +1: very sure) and the total score varies between -15 and +15. A high total score on the scale indicates a high self-efficacy value.

It's the nutrition-related subscale of the Child Heart Health Promotion Attitude Scale, which normally consists of 4 subscales with 16 questions. The aim of the scale is to assess the heart health promotion attitudes of school-age children. The validity and reliability of this Likert-type scale has been studied (Cronbach's alpha coefficient 0.68). In the study, the scale consists of 4 questions and the scale items are scored as 1 "strongly disagree" and 4 "strongly agree" and the total score that can be obtained varies between a minimum of 4 and a maximum of 16 points. A high total score indicates a positive attitude.

It is a food consumption frequency form with 16 nutrients. Participants were required to indicate the frequency of consumption of the specified foods and meals by selecting one of the following options: "every day (5), 5-6 days a week (4), 3-4 days a week (3), 1-2 days a week (2), 1-2 days a month (1) and never (0)".