From Seo Wiki - Search Engine Optimization and Programming Languages
KidRex is a child-safe search engine powered by Google Custom Search. Searches emphasize kid-related webpages from across the entire web. For example, a search for "space" brings up "NASA Kids Club" as the first search result. The site utilizes Google SafeSearch and maintains its own database of inappropriate websites and keywords.
 The site is notable for its colorful hand-drawn crayon and colored marker design. In addition to providing kid-centric safe search results, KidRex offers a premium service entitled KidRex Pro, which extends KidRex's filtering to kid's entire web browsing experience, as opposed to just safe search.