A scout (in some countries a boy scout, girl scout or pathfinder) is a boy or a girl, usually 10–18 years of age, participating in the worldwide Scouting movement. Because of the large age and development span, many Scouting associations have split this age group into a junior and a senior section. Scouts are organized into troops averaging 20–30 Scouts under the guidance of one or more Scout Leaders. Troops subdivide into patrols of about six Scouts and engage in outdoor and special interest activities. Troops may affiliate with local, national, and international organizations. Some national Scouting associations have special interest programs such as Air Scouts, Sea Scouts, outdoor high adventure, Scouting bands, and rider Scouts. Some troops, especially in Europe, have been co-educational since the 1970s, allowing boys and girls to work together as scouts.
Robert Baden-Powell founded the Boy Scouts as an organization in 1908, a few months after the first scout encampment at Brownsea Island Scout camp in 1907. Baden-Powell got the idea from his experiences with the British Army in South Africa. To advance his ideas, Baden-Powell wrote Scouting for Boys for boy readership, which describes the Scout method of outdoor activities aiming at developing character, citizenship, and personal fitness qualities among youth. Many boys joined Scouting activities, resulting in the movement growing rapidly to become the world's largest youth organization.