Let's look at your sentence step by step and make it more clear and correct.
Your sentence is: "Deserts have a lot of wind and very little rain. So little in fact, that water is the most valuable thing for everyone who lives there. Plants have unique ways to save water."
Here is a better way to say it:
"Deserts have a lot of wind and very little rain. In fact, there is so little rain that water is the most valuable thing for everyone who lives there. Plants have special ways to save water."
Explanation:
- We added "In fact, there is so little rain that..." to connect the ideas smoothly.
- "special ways" is easier to understand than "unique ways" for young kids.
- Keeping the sentences short helps make it clearer and easier to read.
So, your improved paragraph for a 7-year-old might be:
"Deserts have a lot of wind and very little rain. In fact, there is so little rain that water is very precious to everyone who lives there. Plants have special ways to save water so they can stay alive."