National Geographic Kids is a general interest nonfiction magazine for 6 to 14 year-olds. It is published 10 times per year. Their stories cover a wide range of topics including “natural history, science, geography, history, and human interest.” They do not accept unsolicited manuscripts. They prefer short and to the point queries of about 250 words. One payment reports suggest that they pay over $1 per word. To find out more, refer to their submission guidelines.