Mukhya Upanishads are like stories that teach us important things about life. They were written a long time ago in a language called Sanskrit, by wise men in India.
There are 108 Upanishads, but 10 of them are known as Mukhya Upanishads because they are the most important ones.
Each of these Upanishads has a different story and message, but they all try to teach us about things like how to live a good life, what happens after we die, and how to understand the true nature of the world around us.
Some of the most famous Mukhya Upanishads include the Brihadaranyaka Upanishad, which talks about the nature of the universe, and the Katha Upanishad, which tells the story of a young boy who learns about the meaning of life from the god of death.
Reading and understanding these Upanishads can help us become better people and live happier, more fulfilling lives.