Google confirms plans for the Chromecast with Google TV on own website. The company says that the Child profiles for Chromecast should appear within about a month. A precise release date has not yet been given, unfortunately.
Child profiles for Chromecast with Google TV
Various devices and services often provide access to child profiles. These are safe environments in which children can freely use that device or digital environment, without you as a parent having to worry about what your children are presented with. Of course things sometimes go wrong, but in general such an option offers a safe alternative.
The child profile for the Chromecast with Google TV does the same. This way, children can use the TV, without you as a parent always having to be present to see what they are going to watch. You set which apps they can use, for example, and ensure that they cannot leave that environment. You protect the rest of the system with a pin code, namely.
Only YouTube Kids is available within the child profile. That is part of the video streaming service with child-friendly content (although it does not hurt to initially watch to see what children are looking for).
Furthermore, it is not yet really clear to what extent the system automatically adjusts things. Will Netflix also start up in the profiles for kids? Those are things we have to wait and see.