What was the problem in pinballs by Betsy byars?

In "Pinballs" by Betsy Byars, the main problem revolves around the struggles of three children—an orphaned boy named Daniel, a girl named Ruth, and a boy named Harvey—who are living in a foster home. Each of them grApples with feelings of abandonment and isolation, as they navigate their difficult personal circumstances. The story explores their challenges in forming connections and finding a sense of belonging, ultimately highlighting the importance of friendship and support amid adversity.