Cat and Yarn tells a touching story of friendship and change. Cat and Yarn's close bond is evident in their inseparability and the joy they find in each other's company. However, when Girl takes Yarn away and returns with him transformed, Cat is understandably upset.

The narrative explores Cat's initial resistance to change and his feelings of anger and sadness. This emotional journey is relatable and provides an opportunity for young readers to empathize with Cat's experience.

As time goes on, Cat begins to recognize the value of accepting change and appreciating the new version of Yarn. This realization highlights an important lesson about adaptability and the potential for positive outcomes even in the face of unexpected changes.