Start with bismillah.
For parents: keep today calm. The lesson is about noticing Allah's signs and following them, not about being frightened.
Ask: "What signs tell you it's going to rain?"
Watch the Naked Scientists video asking whether a red sky at night really means good weather.
Now listen to the ayah together in the app, with the translation. Ask: "What did these people reject?"
Each child keeps one wonder question, for example: "What are Allah's signs, and how do I notice them?" Younger children can draw theirs.