Watching TV, or mobile phone screens before bedtime is for children's . Researchers looked at studies on . Ninety per cent of the studies found that screen time means children go to bed . They have sleep, and poorer sleep. Screens are , so children look at in .
Children need sleep than adults. Pre- children need up to 13 hours a . There are three why screens are bad. First, the from screens makes children think it is . Second, keep children's brains , so they cannot sleep. Finally, children do not exercise, so are not .