“Games, like any other cultural product - books, films, pictures, theater - must be adapted to the age of the recipient. It is incorrect to say that all games are inherently bad for children. As for other media, no adult is likely to allow children to watch violent movies, an eight-year-old will not allow Ulysses or Gray's 50 Faces to read. It's the same with video games. '
More about games in the compendium. Parent, Teacher - this is your MUST HAVE - do you know what your child / student is playing?
The guide is available under the Creative Common Attribution license.