1- Kidtopia 
‘Kidtopia is a Google custom student safe search engine for preschool and elementary students, indexing only educator approved web sites.’
2- Kid’s Search Engine
‘KidsSearch.com is a Safe Search Engine for children. We use Google's Safe Search technology and advanced filtering tools on web content. We offer kid friendly links through our directory, each site is peer reviewed for appropriate content, usefulness and fun.’
3- Teach the Children Well
‘Teach the Children Well is a collection of links to sites carefully selected by a teacher for students as well as their parents and teachers. The site was designed for elementary grades but many of the sites will also be of interest to older students.’
4- Kiddle
‘Kiddle is a visual search engine for kids powered by Google, offering safe kids web, image, and video search. Results are vetted by editors.’
5- DuckDuckGo
DuckDuckGo is not necessarily designed for kids but it does however offer features that allow users to search the net without compromising their private and personal information. DuckDuckGo does not store search history, doesn’t run ads, and does not track users.
6- GoGooligans
GoGooligans is another kid search engine that provide a number of important features including: use Google index to retrieve results, apply  different kinds of filtering features, excludes inappropriate sites and keywords, offers search in over 30 languages and many more.
7- KidRex
‘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.’