How to be happy? A book about where joy is created and how to keep it

In this book, a boy named Sasha with his friend Brain learns how to find joy and where happiness lives. How to be happy? Does it take something extraordinary or is happiness hidden in the simplest things?
Also, you will understand what rules allow you to maintain a good mood even in difficult situations! And how to help the brain always stay active and engaged.
What this book is about: How to stop being afraid of night monsters, darkness, or the dentist? Why is it important to have a daily routine, exercise, and eat properly? How to calm down quickly if you're upset? How to learn to manage your brain to be happy?