Corrected sentence:
Fennec foxes and jerboas have furry soles, so the hot sand won't burn them.
Child-friendly version:
Fennec foxes and jerboas have furry feet so the hot sand won't hurt them.
Why we changed it (simple):
- We put a comma before "so" because there are two ideas joined together.
- We added "the" before "hot sand" to make the sentence clearer.
- "Feet" is an easier word than "soles" for a 4‑year‑old to understand.