Grammar check for a 6-year-old: These beans grow on a tree and make cocoa paste for chocolate

Original: These beans grow on a tree and make cocoa paste for chocolate.

Corrected (simple): These beans grow on trees and are turned into cocoa paste to make chocolate.

1. Trees (not a tree): We use "trees" because "beans" is talking about lots of beans, and they grow on many trees, not just one.
2. Are turned into (not make): The beans don’t make the paste by themselves. People or machines turn the beans into cocoa paste, so we say "are turned into" or "are made into."
3. To make chocolate: This part tells why we make the paste — it is used to make chocolate.

You can also say: "Cocoa beans grow on trees and are made into cocoa paste for chocolate."