He created four stages of development sensorimotor, preoperational, concrete operational, and formal operational. Sensorimotor from birth to age two. The children experience the world through movement and their five senses: sight, smell, hearing, taste, and touch. During the sensorimotor stage children are extremely egocentric, meaning they can’t perceive the world from other people’s points of view. Preoperational starts when the child begins to learn to speak at age two and lasts up until the age of seven. During the Preoperational Stage of cognitive development, Piaget noted that children do not yet understand concrete logic and cannot mentally manipulate information, which is understandable because they are young children. Concrete Operational
