Answer: Looking Glass Self
Step-by-step explanation:
According to the theory of Charles Cooley, he described about the interaction perspective that defines interaction of an person with society. Looking glass self is the aspect he defined as when a person leans about himself/herself through interacting with other people.
He concluded that self image is obtained from the self reflection which we get from others reaction.
According to the situation mentioned in the question, child is displaying the situation of looking glass self because he thinks his silly pranks and jokes are making people laugh with him .Therefore, he considers himself of having humorous personality through interaction with other.