The conversation between human and AI assistant.
[|Human|] Which type of literary device is being used in this sentence?
[|AI|] The literary device being used in this sentence is personification. Personification is when human qualities or emotions are attributed to non-human things or abstract concepts. In this case, eyes are given the human emotion of 'twinkling with joy'.
[|Human|] 
Which type of literary device is being used in this sentence?