At what age does Piaget’s sensorimotor stage occur?

Piaget’s sensorimotor stage occurs from birth to two years of age.123

During this period, children learn to interact with their environment by using their senses and motor skills to engage with external objects and events. This stage is foundational to cognitive development, as it marks the child's initial acquisition of mental representations and the development of object permanence—the understanding that objects continue to exist even when they are no longer visible.32