During Piaget's , children begin to represent the world with words, images, and drawings. They also form stable concepts and begin to reason.

Pre operational stage.

Explanation:

Piaget's explain the theory of cognitive development through the different operational stages. The different stages are sensorimotor stage, pre operational stage and operational stage.

The pre operational is the second stage of cognitive development that remains till 2 years upto the 7 years of age. The children learn the language, motor skill development. The children start learning drawing, emotions and can compare the world with imagination.

Thus, the answer is pre operational stage.

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