The epigonion is like a special kind of musical instrument, kind of like a guitar or a piano, but it's different because it has a lot of strings on it. It was invented a really long time ago by some very smart people who wanted to make music and have fun.
When you play the epigonion, you use your hands to pluck or strum the strings, and this makes different sounds. You can play it fast or slow, and make it sound happy or sad, depending on how you play it.
Even though the epigonion is a very old instrument, people still like to play it today because it sounds really beautiful. It reminds us of the music that people used to play a long, long time ago, and it's like a special way of connecting with history through music.