What does Scrooge see in the first scene from his childhood?

They instantly reappear on a wintry country road around Scrooge's childhood home. Scrooge is deeply affected by the memory, and he walks with the Ghost to the town. They see schoolboys, and the Ghost explains that the people they see are shadows of their former selves, and are unaware of him and Scrooge. The boys run out of school and wish merry Christmas to each other. The Ghost reminds Scrooge that one boy, ignored by the others, remains in school alone, and Scrooge weeps. You can check more out at the GradeSaver link below: