Modification is done then with simple facial and sound changes.

Preoperational: (begins about the time the child starts to talk to about age 7)

In the Preoperational stage (again preconventional) the child is learning the symbolism and processes used for language development and accepting the existence of things which cannot be seen but can be remembered. He or she still does not completely grasp time and often thinks a bout how he or she would like things to be (the idea to make something conventional) and needs to have an active role in learning and application of his or her desires or conceptions.

Concrete: (about first grade to early adolescence)

During the concrete stage the idea of something is very literal, rather than based on ideals and/or fantasies and the individual experiences excessive need for boundaries order and rule following (conventional). He or she has not yet accepted the idea...
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