Modern attic children's room with a mezzanine adorned with a metal railing. Maximum utilization of small space to create a comprehensive living room with a relaxation area. An inversion of the common solution of placing the relaxation area on the mezzanine was applied. Thus, the room was given a consistently neat appearance, leaving the functional area on top. The built-in composition of cabinets and bookshelves does not additionally take up space. Contrast in the interior colours scheme was applied, focusing attention on visually enlarging the space while drawing attention to clever decorative solutions.The use of velux window allowed for natural daylight to illuminate the interior, supplemented by Astro and LED lighting, emphasizing the shape of the attic.