The Kapiti Plain, as I'm sure you have told your children, is in Kenya, not too far south of Nairobi. It would be a good read aloud for 4 to 8 year olds, but the AR dudes say that it's a level 4.6, which would mean you'd have to be an average 4th grader in reading to read this on your own. It follows the "This is the House that Jack Built" pattern.
This tale of a sharpshooting lad causing the rain for a drought stricken country was discovered in Kenya, Africa, more than seventy years ago by the famous anthropologist Sir Claud Hollis. The narrative is intriguing and interest catching for many ages. The artwork is unique and beautiful.