Okay kiddo, so Yoga Vasistha is a book that a long time ago (thousands of years ago!) was written to help people understand how to live a good and happy life. It was written by a very wise person named Valmiki.
In this book, there is a story that a boy named Rama was feeling confused and sad about life. So, his teacher named Vasistha decided to help him by telling him lots of stories and teaching him lots of lessons about how to be happy and peaceful.
The stories read a lot like fairy tales and help us understand the importance of things like kindness, patience, and doing the right thing. So, when we read the book, we can learn these lessons too and try to be happier and nicer people.
Yoga Vasistha teaches us that the mind is very powerful and can make us feel happy or unhappy, so we need to learn to control our thoughts and emotions. The book provides many examples and techniques to help us take charge of our minds and to be happier and more peaceful.
In short, Yoga Vasistha is a book about learning to be happy and peaceful, by controlling our thoughts and emotions, and living a life filled with love and kindness.