YouTube is practically synonymous with online video, and the site hosts videos with the most diverse content, some inappropriate for certain ages, with explicit sexual and violent material. 

Thinking about Google plans to launch soon YouTube Kids, an application that will be directed to the child audience, with the mentioned app be available on february 23, through Google Play. 





The application will have a more colorful interface with thumbnails of videos much larger, still prioritizing voice recognition. The search filter is enhanced to remove any inappropriate content to young children.

Part of comments will be blocked, and popular channels of children's and educational content will be highlighted in the main menu. The possibility of parents or guardians set a time limit for using the application will also be present.


Source : http://androidnigeria.com.ng/youtube-for-kids/

Good move. But it can't stop the kids from visiting the adult site when they want to.