Here's what we can glean from the text:
* Mr. Griffin: The story is told from the perspective of a child, and we don't get a lot of physical description of Mr. Griffin. We know he's an older man and he's described as "tall and thin" and having a "long, pale face" with "gray hair."
* The Narrator (The Child): We know the narrator is a young boy, but again, there's no detailed physical description.
* The Other Children: The other children in the story are also not described physically in any detail.
The book is more focused on the emotional and psychological impact of Mr. Griffin's death and the children's reactions to it, rather than their physical appearances.
If you're looking for more physical details, it's possible that a movie adaptation of the book might provide more information. However, the novel itself focuses on the characters' internal experiences and their relationships with each other.