We rowed the book All Those Secrets of the World. Loved this story. It takes place during WWII when the main character's Daddy goes off to fight in the war. Its a story of perspective.
One of the lessons has to do with the perspective of things when they are close versus far away. The "secret" is that things seem smaller when they are far away. We tried this outside.
In the story, a little boy moves away from the main character until he is no bigger than her fingernail.
We both tested this out.