My sister is four and watches about an hour of a day.
My parents chose the hour carefully after a difficult month last winter.
She had been watching short videos that changed every twenty seconds.
After an hour of those she was and could not play alone.
A longer film with one story had a completely different .
She watches it, talks about it afterwards and plays the same story with her .
My mother now uses one rule: one story, not many pieces.
She also watches the first ten minutes with my sister whenever the film is new.
Nobody in the family thinks an hour of is by itself.
What the hour contains decided everything, and the amount decided very little.