How much screen time is too much for kids?

Long before addiction sets in, a child’s sensitive nervous system can become overstimulated and hyperaroused from moderate but regular amounts of screen time. This causes the brain to be in a state of chronic stress and effectively short circuits the frontal lobe, creating a host of symptoms that mimic or exacerbate mental health, learning, and behavioral disorders.

Source: Is Your Child Overstimulated from Too Much Screen Time? | Psychology Today