If your child is not fully grown or close to it, I recommend the Yamaha JR1 3/4-size Dreadnought. This guitar is designed to fit smaller hands and bodies, which makes it easier for children to hold and play. I had the larger version (below) when I was learning to play. You can purchase it online HERE (affiliate link) and hear it being played in this video:
If your child is fully grown or close to it, I recommend the Yamaha FG800 Dreadnought. This guitar has a full-size body and produces a rich, warm sound that is perfect for both beginners and more advanced players.
You can purchase it online here (affiliate link).
Here it is being played in this video:
Best of luck with your search, and please don’t hesitate to reach out if you have any questions!