What is a primary stage for children?

It seems like you're asking about the "primary stage" in child development. However, that's not a standard term in psychology or education.

To understand what you mean, could you clarify what you're thinking of? Here are some possible interpretations:

* Primary school: This refers to the first stage of formal education, typically for children aged 5-11.

* Early childhood: This refers to the developmental period from birth to about 6 years old, characterized by rapid physical and cognitive growth.

* Primary socialization: This refers to the initial phase of socialization where children learn basic social skills and norms from their immediate family and caregivers.

Please provide more context or specific information about what you're looking for, and I can give you a more accurate answer!