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A stage of cognitive development refers to a period in which children acquire specific thinking abilities and skills that are characteristic of that stage. Each stage represents a different level of understanding and reasoning.
This is the first stage in Piaget's theory, during which infants learn about the world through their senses and actions.
The second stage where children begin to use language and symbols to represent objects and ideas.
In this third stage, children gain the ability to think logically about concrete events and understand conservation.