Wonderful search engine designed around Google's safe search. Very nice visual appeal for kids.

An innovative search engine for kids that displays results in a cloud-based style. Also, has apps for mobile devices.

Ref Seek's intention is to serve only search results that are academic in nature.

A group of experts, including librarians and teachers, evaluates all content from this search engine.

A great site developed in the UK by teachers who approved everything on this site.

WolframAlph is billed as a computational search engine and this is exactly what it does.