Considering that the square game is only one of the five or ten varieties of the game of marbles, it is almost alarming in face of the complexity of … - Jean Piaget

When the child imitates the rules practiced by his older companions he feels that he is submitting to an unalterable law, due, therefore, to his parents themselves. Thus the pressure exercised by older on younger children is assimilated here, as so often, to adult pressure. This action of the older children is still constraint, for cooperation can only arise between equals. Nor does the submission of the younger children to the rules of the older ones lead to any sort of cooperation in action; it simply produces a sort of mysticism, a diffused feeling of collective participation, which, as in the case of many mystics, fits in perfectly well with egocentrism. For we shall see eventually that cooperation between equals not only brings about a gradual change in the child's practical attitude, but that it also does away with the mystical feeling towards authority.

If a baby really has no awareness of himself and is totally thing-directed and at the same time all his states of mind are projected onto things, our second paradox makes sense: on the one hand, thought in babies can be viewed as pure accommodation or exploratory movements, but on the other this very same thought is only one, long, completely autistic waking dream.

Intelligence is what you use when you don't know what to do.