Kids' Fire Safety Tips Buzzy the Smoke Detector and Reddy the Fire Extinguisher teach kids to be fire safe with easy to do tips. History of the United States Flag the story of Old Glory, from its birth in 1776 until 1995. The Last Word Why is the sky blue? Scientists answer this and other burning questions. The Exploratorium Come explore! National Geographic Online edition of the magazine Department of the Treasury - learn about the US money system, who controls it, how it's made and how the US treasury works. The Bear Den - facts and fun about bears.