Parent reports of child screen time to quantify minutes/day screen-time total. Parents will complete a survey adapted to provide information about the child's screen-time (separately for TV, computer, games console and smartphone) on weekdays and weekend days. For each item the parent will be asked to report the time the child spent using it for (a) a normal weekday and (b) a normal weekend day, with response options: none; 1 to 30 minutes; 31 minutes to 1 hour; 1 to 2 hours; 2 to 3 hours; 3 to 4 hours; 4 hours or more. The assessment of TV viewing using parental report has been shown to correlate moderately (r=0.60) with 10 days of TV diaries among young children.

Cross-sectional and longitudinal associations among sedentary behavior (by screen-time observation/self-report and accelerometry) and physical activity (by accelerometry). The mean and standard deviation for time sedentary behavior and physical activity are presented in the table below.

Cross-sectional and longitudinal associations among Test of Gross Motor Development, 3rd edition (TGMD-3), and subscales (Ball Skills and Locomotor Skills). The TGMD-3 is a process-oriented assessment designed to assess gross motor performance of young children age 3-10 years. The total score for each item is established by the summation of all performance criteria scores for both trials, which are accumulated to determine the total locomotor and ball skills subtest scores and the overall TGMD-3 raw score for gross motor performance The maximum score a participant can obtain on locomotor is 46, for ball skills its 54, and overall gross motor performance is 100. The minimum score a child can receive is 0. Higher scores indicate better performance. Lower scores help identify delays and deficits in gross motor development in early childhood.

Classroom observation of child screen-time will be measured with the Environment and Policy Assessment and Observation (EPAO) method to quantify average minutes/day screen-time in childcare center. Screen time will be assessed using classroom observation at the childcare center (from the EPAO observation in Aim 1). Results are reflecting changes in screen-time.

Parent reports of child screen time to quantify minutes/day screen-time total. Parents will complete a survey adapted to provide information about the child's screen-time (separately for TV, computer, games console and smartphone) on weekdays and weekend days. For each item the parent will be asked to report the time the child spent using it for (a) a normal weekday and (b) a normal weekend day, with response options: none; 1 to 30 minutes; 31 minutes to 1 hour; 1 to 2 hours; 2 to 3 hours; 3 to 4 hours; 4 hours or more. The assessment of TV viewing using parental report has been shown to correlate moderately (r=0.60) with 10 days of TV diaries among young children.

110 parents completed the screen time survey in year 1. In Year 2 this dropped to 36. Some questions only one or two parents did not answer. All questions

Cross-sectional and longitudinal associations among sedentary behavior (by screen-time observation/self-report and accelerometry) and physical activity (by accelerometry). The mean and standard deviation for time sedentary behavior and physical activity are presented in the table below.

107 participants had complete physical activity and screen-time data sets at Baseline. Researchers followed up a year later- at this follow-up time, 53 participants had complete data sets at baseline and follow-up. "Cross-sectional" arm presents the mean number of hours participants spent in light physical activity, moderate-to-vigorous physical activity, and screen time - at baseline. The "Longitudinal" arm presents means at follow-up.

Cross-sectional and longitudinal associations among Test of Gross Motor Development, 3rd edition (TGMD-3), and subscales (Ball Skills and Locomotor Skills). The TGMD-3 is a process-oriented assessment designed to assess gross motor performance of young children age 3-10 years. The total score for each item is established by the summation of all performance criteria scores for both trials, which are accumulated to determine the total locomotor and ball skills subtest scores and the overall TGMD-3 raw score for gross motor performance The maximum score a participant can obtain on locomotor is 46, for ball skills its 54, and overall gross motor performance is 100. The minimum score a child can receive is 0. Higher scores indicate better performance. Lower scores help identify delays and deficits in gross motor development in early childhood.

107 participants had complete physical activity and screen-time data sets at Baseline. Researchers followed up a year later- at this follow-up time, 53 participants had complete data sets at baseline and follow-up. "Cross-sectional" arm presents the mean number of hours participants spent in light physical activity, moderate-to-vigorous physical activity, and screen time - at baseline. The "Longitudinal" arm presents means at follow-up.