Mystery play

Okay, so a mystery play is like a play that tells a story from the Bible. It's called a mystery play because back in the day, people used to call these stories "mysteries" because they were about mysterious things that happened long ago.

The play usually happens outside, and lots of people come to watch. There are actors who dress up in costumes and pretend to be the characters from the story. Sometimes there are even special effects like fireworks or sounds to make it feel more real.

People would watch the play to learn more about the Bible and the stories in it. It was a way for them to feel closer to God and learn about their religion in a fun way.

So, that's what a mystery play is - a play that tells a story from the Bible to help people learn more about their religion.