The main theme of your story appears to be the consequences of laziness and the importance of perseverance and hard work. Throughout the story, Little Dino's laziness leads to negative outcomes such as failing exams and feeling isolated from his friends. However, through self-reflection and determination, Little Dino learns to overcome his laziness and succeeds in achieving his goals.
This theme emphasizes the idea that success is often the result of consistent effort and perseverance, while laziness can lead to missed opportunities and disappointment. Overall, the story serves as a reminder of the value of diligence and the rewards that come from hard work.