# data[].attributes.body
Approximate Ages:
11 years and onward

Chief Characteristics:
Understand abstract ideas and hypothetical situations; capable of logical and deductive reasoning.

# data[].attributes.body
Approximate Ages:
7 - 11 years

Chief Characteristics:
Begins to understand the concept of conversation; still has trouble with abstract ideas; classification abilities improve; masters concept of conversation.

# data[].attributes.body
Approximate Ages:
2 - 7 years

Chief Characteristics:
Lacks operations (reversible mental processes); exhibits egocentric thinking; lacks the concept of conversation.
Use of symbols (such as words or mental images) to solve simple problems or to talk about things that are not present.

# data[].attributes.body
Approximate Ages:
Birth - 2 years

Chief Characteristics:
Behavior consists of simple motor responses to sensory stimuli; lacks the concept of object permanence.