Second-grader Sarah Morris was a little girl with a big idea for her school. After reading an issue of National Geographic Kids, Sarah approached her teacher, Kaitlin Smith, and asked if Mount Vernon Exploratory School in North Hall could help the magazine break Guinness World Records’ titles for the most people to run 100 meters in 24 hours and the longest chain of shoes. The magazine’s initiative is part of Run for the Planet, whose mission is to motivate kids and their families to do something good for their health and the environment.