Kid Friendly Search Engines

Some teachers have been asking for search engines that filter out inappropriate material for students. Below are two such engines. If you know of any other kid friendly search engines, please let me know.
This search engine pulls information from different reference materials including dictionaries, almanacs, encyclopedias, etc. Students can search all reference materials or they can search in a specific reference book. Also, students can search in a particular topic such as people, science, math and money, etc.
Created by librarians, this site allows students to search by keywords or by subject. Each link contains a brief description of the site, the number of illustrations, and the reading level of the site. Great Search Engine for Elementary Students! for high school - journal articles

Using Google Effectively