This work involves the construction of symbolic diagrams that are representatives of the logical relations used by children of between 3 and 5 years old, in infant education, in the process of resolving transformational tasks, which are presented through symbolic code and put forward in two forms: as the application of the code and as the discovery of the code. The diagrams facilitate an explanation of the results found in the experiment involving 211 preschoolers.

logical reasoning, logical thought, relational mathematics, preschool education.