It is planned as 6 sessions, 1 session per week for children and parents. The program will be introduced to children and parents under the call with "Screen-to-Move-Program (STEP)". The symbol of the program has been created and this symbol will be hung on the classroom door. Sessions for children include story, picture, video demonstration and active playing activities. A more clear, simple and understandable language will be used for children, and reinforcements will be used. For parents; There will be 6 training sessions in the form of presentations. At the same time as the children's activities, information notes will be sent to the parents outlining the expectations. Before the intervention, after the intervention and in the 3rd month, children's screen use time, daily physical activity time, sleep time, parents' knowledge, behavior, attitude and self-efficacy about their children's screen use time will be evaluated.

Screen use time, daily physical activity time, sleep time, parents' knowledge, behavior, attitude and self-efficacy about children's screen use time will be evaluated simultaneously from the control group with the intervention group. After the 3rd month follow-up test, the STEP will be applied to the children and parents in the control group.

It is planned as 6 sessions, 1 session per week for children and parents. The program will be introduced to children and parents under the call with "Screen-to-Move-Program (STEP)".

Children's screen usage time will be evaluated with questions. "How long (…hours…..minutes) on average did your child use any device with an electronic screen, such as a smartphone, tablet, video game, or watch television, movies, video games in a day?". Daily screen usage time will be evaluated in minutes. A maximum of 60 minutes of screen time is recommended for pre-school children (World Health Organization, 2019).

Children's physical activity levels; Item 1: "How long is your child active on average in a day? (e.g. walking slowly, making the bed etc.)" and Item 2:"How long does your child do physical activity in a day, on average, until he is out of breath?" (walking fast, cycling, running, playing ball games, swimming, dancing, etc.) will be evaluated based on parent self-report. The total daily (Item1 + Item2) physical activity time will be evaluated in minutes. A minimum of 180 minutes of physical activity is recommended for pre-school children (World Health Organization, 2019).

Pre-school children's daily step count will be measured with the OMRON HJ-109-E pedometer. In our study, the number of steps for children aged 3-5 will be evaluated as 11,500 steps, which is stated to correspond to the 180 minutes physical activity target recommended by the World Health Organization for children aged 3-5 (De Craemer et al., 2015; World Health Organization, 2019).

The information form was created by researchers in line with the literature (World Health Organization, 2019). The form contains information about the PA, screen usage time and sleep duration of the children of parents who have children between the ages of 2-5 and consists of 14 questions. For each item, the correct option is scored as 1, and the incorrect and I don't know option is scored as 0. The total score obtained by collecting the items varies between 0-14 points. A high score indicates a high level of knowledge.