Final answer:
A child using senses and motor skills to understand the world is in Piaget's sensorimotor stage, which is the first stage of cognitive development lasting from birth to about 2 years old.
Step-by-step explanation:
A child who uses senses and motor abilities to understand the world is displaying characteristics consistent with Piaget's sensorimotor stage of cognitive development. This is the first stage in Piaget's theory of cognitive development, lasting from birth through age 2. During this period, children learn about their environment by using their sensory experiences and through physical interactions. As they mature, they develop new cognitive skills, such as the concept of object permanence, which is the understanding that objects continue to exist even when they cannot be seen or heard.
According to Piaget, the other stages that follow are the preoperational stage (ages 2 to about 7), where children start to use symbols and engage in pretend play but lack the ability to perform operations or understand the concept of conservation; the concrete operational stage (ages 7 to 11) where children begin to think logically about concrete events and understand conservation; and finally, the formal operational stage (age 11 and up), where abstract and hypothetical thinking become possible.