What is the dynamic character of Turnabout by Margaret Peterson Haddix?

In "Turnabout" by Margaret Peterson Haddix, both the main characters, Katherine and Benjamin, experience significant changes in their personalities and perspectives over the course of the novel. They grow and evolve as they navigate the challenges of being suddenly young again after being old for many years, leading to a deeper understanding of themselves and each other. This transformation highlights the dynamic nature of their characters as they adapt to their new circumstances and learn to appreciate life in a different way.