From Google Blogscoped
Quotes from Russian creator, Yakov Sadchikov,
"Kids often do not know how to make a search query. They would rather use an interactive tag cloud and navigate through the cloud to find information. Quintura teaches kids how to search through the cloud of related tags/words/phrases.
Using a keyboard and typing query words in a search box is a barrier for kids. They often make orthographical errors while typing. Then they cannot easily and quickly find what they look for and loose their interest to searching.
It returns too many irrelevant results that disorient children and make them lose attention to an initial search topic while looking [through] those results."