Saar approaches children’s book illustration through design, paying close attention to how image, text, rhythm, and page structure work together. Her background in product design shapes the clarity and construction of her visual language.

Her debut illustrated book Lift brought international recognition and was included in the White Ravens catalogue. Since then, her books have continued to attract attention beyond Estonia, establishing her as a notable voice in contemporary illustration. Playful and spirited, her illustrations are closely integrated into the whole design of the book rather than treated as separate images.