On stage at an early age estimates are sensorimotor birth to 2 years (2007: 15 Trianto.). Later added by Natsir (2004: 7) children who are in the period of knowledge the motor behavior of fiercely dominated by reflex movements or is the motor. On stage at an early age estimate of praoperasional 2 to 7 years and the main capabilities that the development of the ability to use symbols to express the world's objects (Trianto. 2007: 15). In general the characteristics of thinking ability of children praoperasional are: a). egosentri, meaning children are difficult to accept other people's opinions in communicating. Irreversibel, b). the children have not been able to think as opposed to the original way of thinking. c) centered (centering) meaning thought children only fixed on aspects or details of an event or object and other aspects are ignored. d). Noticed centered on aspects that are static, meaning that children haven't been able to understand the transformations on an object. transduktif Reasoning. e), how children's reasoning cannot be categorized in the form of deductive and inductive reasoning. f). Concerenteness, the ability to think children were oriented to concrete things (Natsir. 2004: 8). On concrete operational phase estimates her age is 7 to 11 years of age and the ability of major improvements in the ability to think logically, new capabilities include the use of operations that may be turning. The thought is no longer sentrasi, but desentrasi, and problem solving are not so constrained by keegosentrisan (2007: 15 Trianto.). At the stage of formal operations estimates of the age of 11 years to adulthood (Trianto. 2007: 15). Later added by Natsir (2004: 9) formal operation on children can already use operations logically to accomplish the task or problem that is verbal, complicated and complex. In addition to the logical operation, children formal operations have been able to think mortgages-deductive, i.e. the ability of composing a series of hypotheses and test the hypothesis which is true. The ability to think of probability or a combinatorial ability compose different combinations are possible on the elements of a system. The fourth characteristic is the reflective thinking i.e. ability to rethink his own way to get better results (Natsir. 2004: 9-10).
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