I'll have a go at it.
No parenting. A friend who went to the workshop said no fathers, but I'd just cut the kids off from the adults wholesale, aside from meeting their needs, and even then it would be a matter of discretion whether to give a child or group of kids some object, information or lesson. As a consequence, a person's name can only come from their peers or their choice.
Destruction would also be socially conventional. Destruction especially of structures (these would be burned down regularly in the form of a game in which one team tries to burn everything down and another team tries to stop them, but more importantly the membership of the teams is secret and there are spies and double-agents) and of language-forms, and destruction of a person's clothing, personal effects when they die (and, at least for a time, one does not speak their name or keep images of them). These would have their necessary accompaniment of creation, of course.
Everyone would have a wooden puzzle of unique construction, entertaining to play with and seemingly impossible to solve.
And a mask.