Conversation so far:
what is the parting of the red sea
The Crossing of the Red Sea is part of the biblical narrative of the Exodus, the escape of the Israelites, led by Moses.
What is the blood of the Nile River?
The sudden appearance of red-hued waters in the Nile could have been caused by a red algae bloom.
What is the rational behind the locusts in Exodus?
The volcanic eruption on Santorini may have created favorable conditions for the locusts: higher precipitations and higher humidity.

Question: How did the kids die in the book?
Self-contained rewrite: Why did the firstborn Egyptians die in Exodus?