Current scholarship generally characterizes temperament as stylistic and relatively stable traits that subsume intrinsic tendencies to act and react in somewhat predictable ways to people, events, and other stimuli. An understanding of children's temperament preferences aids our understanding of the origins of behaviors as well as normal attitudes children display at home, school, and elsewhere. The purpose of this paper is to provide an introduction to children's temperament along with a desire that this information serve to stimulate further research and applications in Brazil. The concept of temperament has evolved from a classic (Hippocrates and Galen) to a modern (Jung and Myers and Briggs) perspective. Two theoretical orientations (Thomas and Chess as well as Oakland and colleagues) provide somewhat popular methods to explain temperament constructs displayed by children and youth. This paper focuses on Oakland and colleagues' approach to temperament in children ages 8-17 in terms of the eight basic styles that are grouped into four bipolar traits: extroverted or introverted, practical or imaginative, thinking or feeling, and organized or flexible styles. Descriptions of the temperament styles and their corresponding behavioral characteristics in children are included. Findings from cross-national research on children's temperaments also are discussed.