Sentence examples for a great kid from inspiring English sources

The phrase "a great kid" is correct and usable in written English.
It can be used to describe a child or young person who is well-behaved, kind, or admirable in some way.
Example: "Everyone in the neighborhood agrees that Timmy is a great kid; he always helps others and is polite to everyone."
Alternatives: "an awesome child" or "a wonderful young person".