What is the first stage of Piaget's cognitive development theory?

In Piaget's theory of cognitive development, the first stage is the Sensorimotor stage. This stage occurs from birth to approximately 2 years of age and is characterized by the infant's use of their senses and motor actions to explore the world around them. During this stage, children learn about their environment through direct physical interactions, such as grasping, sucking, and looking. They also develop important cognitive skills, such as object permanence, which is the understanding that objects continue to exist even when they cannot be seen. This foundational stage sets the groundwork for further cognitive development as the child grows.