Final answer:
According to Piaget's theory, children go through the pre-operational stage from ages 2 to 7 years old.
Step-by-step explanation:
Piaget's Stages of Cognitive Development
The pre-operational stage, according to Piaget's theory of cognitive development, occurs between the ages of 2 to 7 years old. During this stage, children can use symbols to represent words, images, and ideas, engage in pretend play, and begin to use language. However, they cannot understand adult logic or mentally manipulate information.
In contrast, the concrete operational stage occurs from about 7 to 11 years old, where children can think logically about real events and have a firm grasp on numbers and memory strategies. They can also perform mathematical operations and understand the concept of conservation.
Based on Piaget's theory, the pre-operational stage aligns with the age range of 3-5 years old.