The presented book is the first of two parts in this series. An amazing, incredible journey and adventure await the boy Vanechka, who was left in kindergarten for the weekend. At night, the toys in the playroom come to life and together with Vanya go on a journey. Overcoming many obstacles, the heroes find themselves in a magical underground world, meet its extraordinary inhabitants and learn the history of the underground people. Many touching and exciting moments await the little reader. The tale is kind, sincere and beautiful. The events that happened in the magical world will teach friendship, independence, responsibility, teach you to love and take care of nature. In the first book, the reader meets all the characters and makes their first journey with them into a magical underground land. The second book is filled with many amazing adventures, where the heroes, having returned to the fairy-tale world, overcome dangers, show courage and even heroism, save friends and make new friends.