In Gertrude Chandler Warner's "The Boxcar Children," the central mystery element plays a significant role, yet the author did not consider these stories to be limited to juvenile mysteries. She emphasized themes of independence and resourcefulness among the characters, particularly the Aldens, who exemplify strong values of self-reliance and practical problem-solving.

The Aldens embark on their adventures with minimal adult interference, which adds to the appeal for young readers. This autonomy not only fosters their imaginative play but also resonates with children seeking adventure and freedom, allowing them to connect with the characters' resourceful spirit and New England values.