He was mourned as the "little hero" who had made Aleppo laugh. [His hopes had been for much bigger things, when he was really a man.
So while he is young, he is thinking about what he wants when he is grown. He is just dreaming about what he wants and his desires and hopes when he becomes an adult. In other words, as a child, h
e is thinking about perhaps being a good father, having a great job, driving a cool car. So he dreams about his hopes when he is an adult.
I hope that helps.