Name and describe the four stages of Piaget's theory

What will be an ideal response?

A good answer will include the following key points:
+ Sensorimotor Stage (birth to 2 years): Infants' knowledge of the world is based on senses and motor skills. By the end of the period, the infant uses mental representations.
+ Preoperational Stage (2 to 7 years): Children learn how to use symbols such as words and numbers to represent aspects of the world, but relate to the world only through their own perspective.
+ Concrete Operational Stage (7 to 11 years): Children understand and apply logical operations to experiences, provided they are focused on the here and now.
+ Formal Operational Stage (adolescence and beyond): Adolescents and adults think abstractly, speculate on hypothetical situations, and reason deductively about what may be possible.