Anglo Saxon mythology is like a super special book of stories about some really powerful and cool people and creatures from a long time ago. These stories were told by our ancestors, who lived in a place called England back when it was a very different place.
In these stories there's lots of characters with different powers and personalities, some of them are gods and goddesses like Thor, Freya, and Odin. They can control things like the weather, animals and even the future. They even have their own special places that they live in, like Asgard or Valhalla.
They also have some special creatures like dragons and giants, and they even made up some monsters like Grendel who can't be hurt by weapons.
People believed in these stories a long time ago and thought they were true, just like some people believe in different religions today. They believed these stories could help explain the world around them and give them comfort in tough times.
So, Anglo Saxon mythology is basically a big book of stories about powerful and mysterious people and creatures from a long time ago. It's like a really exciting fantasy adventure that people told each other to help them understand the world they lived in.