What does mama make the children do after they go to the Wallace store in Roll of Thunder Hear My Cry?

Oh, what a lovely moment in the story! After visiting the Wallace store in "Roll of Thunder, Hear My Cry," Mama makes the children wash their hands thoroughly with lye soap to cleanse away the dirt and any lingering memories of the store. It's a gentle reminder of the importance of cleanliness and self-respect, even in the face of difficult situations.