In this project, one of the tasks was to design a room for a 5-year-old girl by transforming a guest room into a multifunctional children's room. Fairy tales, kings, and princesses inspired us to design a children's sleep and play castle. According to our drawings, we produced a design that includes towers with lighting and built-in shelving for books, a slide, a niche for a bed, and a closet for storing toys. We brought switches and sockets to the bedside areas of the house and provided a large sleeping place for relaxation, friends, and games upstairs. Furnishings fit perfectly into the interior, accented with furniture from Italian factories Altamoda and Volpi. The fairy-tale world is also reflected in custom wall paintings.