Grandpa Jake tells Tristan and Troy a story about Crispin the dinosaur to help them understand the importance of forgiveness and taking responsibility. In the story, Crispin accidentally destroys his sister's garden while playing a game with his friends. However, he and his friends work together to fix the garden. This teaches Crispin the lesson of taking responsibility for his mistakes. Similarly, Grandpa Jake helps Tristan and Troy fix Tristan's broken toy fire engine, and Tristan forgives Troy for the accident.