Games have a symbolic function, they serve as symbols that help create contexts, anticipate situations, plan future actions or interpret reality. Game favors the process of enculturation and arises naturally. It is indispensable for psychomotor, intellectual, emotional and social development, as skills develop with it and children learn to respect rules and have goals and objectives (the playground games).

Games are a right. According to Declaration of Rights of Child, adopted by the UN General Assembly, The child shall have full opportunity for play and recreation, which should be directed to same purposes as education; society and the public authorities shall endeavor to promote the enjoyment of this right. Game is not only a form of entertainment but also the best way of learning, children learn to cope with various situations they will face throughout their lives.

Game of marbles (fingernail ball) are excellent examples of children's game with rules, they are playable by 6 years of age. In history of human species, formal game appeared as a result of sedentary need for mental and physical development. In formal game the object of each game is defined and governed by the rules themselves, not representations. Thanks to this ability to set rules and play within the species has been able to build key game such as democracy, religion and science.

Game always help build implicit or explicit relations between children bolstered by fun and educational reference. It is an activity that has the end in itself, ie, the individual performing the activity itself to achieving the goal that is to be pleasant. Game has an intrinsic purpose and character of conflict is liberating because it ignores the problems and solve them. One of its main features, which aims to make an ordinary business activity added motivation.

Early game and varied positively contributes to all aspects of growth and is linked to four basic dimensions of child development that are psychomotor, intellectual, social and affective-emotional eventually. Stimulate the capacity to reason, to encourage reflective thinking and representative. Create sources of potential development, ie what can be.

Currently, as with the definition of game, there are plenty of ideas of sport according to author to be taken as reference. Also conducting another synthesis of authors could define sport and distinguish simple game as follows: Sport is a set of motor and intellectual situations unlike game you are looking for competition with others or yourself, in that precise and specific rules that are institutionalized.

Mammals are characterized by an evolved brain, long childhood, parental care, nursing pups, hunt group, social division and non-genetic work. Mammals play to hunt in a group, define hierarchies, exploration, division of labor, among others. Interaction between mammals (dogs, cats, water, primates) is based on imitation and exploration by trial and error. In some mammals there is a total lack of symbolic play.

They are more solemn game also have been transmitted from generation to generation, but its origins date back to very ancient times. They have not only passed from father to son, but in its preservation and dissemination have had much to see the institutions and organizations that were concerned that would not be lost with the passage of time. They are closely linked to history, culture and traditions of country, a region or a nation. Its rules are similar, regardless of where they are developed.