The family dynamic in 'Second Hand Lions' is probably based on the true story. The way the boy is sent to live with his uncles and how they initially seem reluctant but then grow to care for him deeply. The uncles' reclusive lifestyle and the small town setting where the story unfolds could also be aspects taken from the true story. The way the town reacts to the uncles and the boy might also be inspired by real - life interactions that were part of the original story.
The general premise of the relationship between the young boy and his two uncles is likely based on the true story. It forms the core of the movie's emotional and character - driven plot.
The characters' personalities might be drawn from the true story. For instance, the uncles' gruff exteriors but kind hearts could be part of the real - life inspiration. Also, the idea of the uncles having a mysterious past that is gradually revealed could be based on the true events. Their hidden treasures and the stories behind them may also have a basis in the truth that the movie is founded on.