Use the following excerpt from "Song of Becoming" to answer the question.
They're only boys who used to frolic and play launching rainbowed kites on the western wind, their blue-red-green kites whistling, leaping, trading easy laughter and jokes dueling with branches, pretending to be great heroes in history.
Which of these ideas is most closely related to a theme in these lines?
sharing dreams of a hopeful future
carefree days of a happy childhood
friendly competition between friends
relaxing in the company of a good friend