In most modern countries today, romantic love is the reason that people marry, but at the time period of 400 BCE, marriages were arranged. Fathers had legal control over their daughters until a suitable match was found for them. Most girls married around the age of fifteen. This seems to be a young age but the average lifespan at that time was around 35-40 years.
This website would be great to have kids explore, or even use as sources for projects. What I highlighted is a section about Greek women that kids probably don't realize because our ideas about marriage today are extremely different.