Below is a list of kid-friendly search engines.

Awesome Library     

A-Z Animals

Britannica Kids Enclyopedia

Cyber Sleuth Kids          

Enchanted Learning     Animals for younger students

Enchanted Learning Home

Fact Monster     

Google Safe Search for Kids     

Google Scholar    

ipl2     

Ivy's Search Engine Resources     

KidRex     

Kids Click     

Kids Konnect  - do not click on any ads. 

Kids.Net.Au       

KidTopia       

Living Library     

NC Wise Owl    

Virtual Learning Resource Center     

Sites used for student research

Biography.com  (Biography Channel)       

History.com (History Channel)

Photographic Dictionary     Younger students

Time for Kids

National Geographic for Kids     - login is ajenkins@neusecharterschool.org, pw nationalgeo2014

Social Studies for Kids     - for older students as you need to hit the X to close the ad first.

Meta-Search Engines

Dogpile

Metacrawler