The theme of self - discovery could be in it. When going back to first grade, the person might learn new things about themselves, like how they've changed over the years or what they really missed from their childhood. Also, the theme of acceptance might be there. They have to accept being in a much younger environment and all the differences that come with it, which could lead to personal development.
One possible theme could be friendship. 5th graders are at an age where they value their friends a great deal.
One possible theme is friendship. In 3rd grade stories, characters often learn about the value of having friends and how to be a good friend.
I don't actually know the specific 'back to first grade story'. It could be about someone who has to go back to the first grade perhaps due to some educational setbacks or a unique life situation. Maybe it's a story of a person starting over, learning basic things again like reading, writing and arithmetic, and facing the simple joys and challenges of being in the first grade all over again.
One possible theme could be isolation. Silence often implies being alone or cut off, and in a back story, it might show a character's struggle with feeling isolated from society or their loved ones.
Nostalgia could be a theme. If it's a story looking back at the time when someone was in pampers, it's often about reminiscing and feeling nostalgic for that period of life. Also, growth and development could be themes. The story might show how a person has changed from being a baby in pampers to who they are now.
Another theme could be the loss of innocence. The war would have exposed people to violence and death, and those involved might have lost their naivete. For example, young soldiers going to Vietnam and coming back changed forever. Also, a theme of friendship might be present. Soldiers or civilians might form strong bonds during those difficult times to support each other.
One possible theme could be regression. It might explore the idea of going back to a more innocent or dependent state, like infancy when diapers are used.
One possible theme could be love. The letter might be a love letter expressing deep affection and passion.
One possible theme could be friendship. In second grade, making friends is important, and Julius might be going through experiences related to that.
One possible theme could be friendship. Fourth graders often start to understand the importance of having good friends and how to be a good friend.