The Rainbow and God's Promise to Noah

I read to Bernice about the story of Noah from Genesis (Old Testament) as our Bible lesson which we will tackle for 1 week through story reading, activities, and artwork.

She is shocked when I told her that God wiped out the humanity through the flooding. I also asked her to re-tell the story based on how she understood it. Her comment was, "Because people became bad and they are punished by God." Which is totally correct.