I want you to act as the author of a fairy tale for children. Write a magical children's fairy tale of 2000 symbols. There should be no sex, alcohol or drugs in the fairytale. The fairy tale should have the following good characters: woman Елена, her child Боря, the young witch NAME_1 and her helper Inventor NAME_2 NAME_3. There is also an evil character in the fairy tale, the witch NAME_4. The location of the fairy tale: a magical world Tridevyatoe Tsarstvo. The plot of the tale: the main characters must retrieve the Book of NAME_5 from NAME_4 and defeat her by going through a series of difficult trials. The story should have unexpected plot twist and interesting dialogues between the characters.