" Children do cooperate (most of the time, at least) when they’re involved in finding solutions to problems; they will understand “no” when they are developmentally ready; and they listen when parents listen to them and talk in ways that invite listening. Problems are solved more easily when parents use kind and firm guidance until children are old enough to be involved in the process of creating limits and focusing on solutions. "

― Jane Nelsen , Positive Discipline: The First Three Years: From Infant to Toddler--Laying the Foundation for Raising a Capable, Confident Child