Your nephew was born in mid-June, so you had 2 months to play with him before you left for school. It seemed like your nephew really enjoyed when you rocked and held him. When you saw him next at Christmas, he was 6 months old. What was likely his reaction at seeing you again?

Both stories have something in common

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.