A3-year-old has a harder time catching a ball, whereas a 9-year-old has an easier time catching a ball. one contributing factor for why the 9-year-old has an easier time catching the ball in contrast to the 3-year-old is

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.