This site is good if kids need to do school assignments or something. It teaches some math, history, and other things. This site has some ads on it, but that's because it's free. It's mostly okay for kids, but on the Greek mythology section I saw that they mentioned virgin goddesses or gods impregnating humans/gods. This is common in Greek mythology, but I don't think it's appropriate for young kids. They also mention some wars, but again, it's aimed at kids.