A child's drawing is an important means of communication with the environment and often reveals deep internal processes of the child. This paper illustrates how artistic expression develops in children and how it can be crucial in diagnosing their emotional and psychological states. The focus is on understanding the developmental characteristics of the child and how they manifest through artistic expression. A child's drawing plays a significant role in diagnosis, especially in identifying emotional difficulties or traumas that the child may be experiencing at that time. Art therapy, or therapy through art, has proven to be a useful tool in interpreting children's drawings and understanding their inner states. Through drawings, children often express their emotional problems or traumas in a subtle manner. Recognizing symbols and patterns in children's drawings can help identify the need for art therapy and provide the necessary assistance to the child. The artistic process enables the child to "speak out" about their inner experiences in a way that may be challenging through verbal language. Through research on children's drawings and the artistic process, the aim is to highlight the importance of this tool in diagnosing children's emotional and psychological states and to provide them with adequate support and therapeutic intervention needed for their further development.