National Park Service - Webrangers

The National Park Service Webrangers site has interactive activities about the US National Parks.  Users can search for activities by category, keyword, or difficulty level.  Activity categories include people, animals, history, parks, nature, science, and puzzles.  Users can sign up to be a webranger or view activities as a guest.  Here are a few activities from the site.

• Photo Explore - View old photographs to learn more about people and places from the past.
• Railroad Connections - Learn about how trains connect to the national parks by solving mysteries.
• Yesterday and Today - Compare tools from the past to tools we use now.