Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites. National Park Service Search Exiting nps.gov Rate the Lesson Plan Girl Scouts Brownie Hiker adventure at Carl Sandburg Home NHS Grade Level: Lower Elementary: Pre-Kindergarten through Second Grade Subject: Science For this activity you will get to explore Carl Sandburg Home NHS while earning the Brownie “Hiker” badge. Y