Children's games constitute the most admirable social institutions. The game of marbles, for instance, as played by boys, contains an extremely complex system of rules - that is to say, a code of laws, a jurisprudence of its own.

Before playing with his equals, the child is influenced by his parents. He is subjected from his cradle to a multiplicity of regulations, and even before language he becomes conscious of certain obligations.

All morality consists in a system of rules, and the essence of all morality is to be sought for in the respect which the individual acquires for these rules.

Jean Piaget Quotes