1- Ask Kids
Ask Kids is a search engine designed exclusively for young people ages 6 to 12. It's a free, safe, fun way for kids and their parents to quickly and easily research school topics like science, math, geography, language arts, and history in a search environment that's safer and more age-appropriate than traditional, adult search engines.
KidRex is a fun and safe search for kids, by kids! KidRex searches emphasize kid-related webpages from across the entire web and are powered by Google Custom Search™ and use Google SafeSearch™ technology.
KidzSearch offers a unique solution to this important problem. When a search is done on KidzSearch.com, it can only return Google "strict" search results and is not dependent on any computer, cookie or browser settings. The same trusted high-quality search results as Google are returned, but without adult content mixed in them.
4- Searchy Pants
Searchy Pants is a simple and safe internet search engine for families, children and pupils. Searchy Pants allows children, parents & schools to create a custom search home page for their child to use and allows families to easily communicate by leaving custom messages.