E – Everyone
N – Not rated
T – Teen, may contain some language and subjects unsuitable for young children
R – Risque, may not be suitable for minors

Content rating is voluntary, with the exception of R-rated pieces.

You may also find some older articles with the older (and more unique) ratings:

Safe – safe for everyone
Scissors – safe if you are allowed to use scissors unsupervised
Fire – safe if you are allowed to play with fire unsupervised
Murder – safe if you’ve killed a person

More Information: