Recent developments in children's rights have led to increased criticism of the presumption of total incompetency until adulthood, a concept inconsistently defined by state law. Citing proposals from several disciplines, this article calls for increasing actual competency in decision-making through systematic education in conjunction with developmental levels and experience. The elements of informed consent are suggested as one mechanism for learning to make educated decisions in a variety of settings. The treatment of hyperkinetic children is discussed as a case example.