Final answer:
The sensorimotor stage is the first stage of Piaget's theory of cognitive development where children learn about the world through their senses and motor behaviors.
Step-by-step explanation:
The sensorimotor stage is the first stage of Piaget's theory of cognitive development, which occurs from birth to around 2 years old. During this stage, children explore and learn about the world through their senses and motor behaviors. For example, they may put objects in their mouths to see if they are edible or shake and bang objects to hear sounds. Around 5 to 8 months old, they develop object permanence, which is the understanding that objects continue to exist even when they are out of sight.