I believe the
correct answer is: Preoperational stage.
In the cognitive
theory of Jean Piaget, the stage of development in which children start using
language to convey their thoughts is the second stage of development or
preoperational stage (from the age of two to seven). In this stage children can
understand and convey the symbolic use of language and convey their thoughts,
but still can’t grasp the logical thinking of adluts.
