Benjamin Fitzgerald Pincus at primary school-age
In my mind, before he discovered fanny packs, Ben carried his mother's small, old bag to take his most important belongings everywhere.
Because his father was very embarrassed about it ("boys don't carry handbags!"), his mother only got him his first fanny pack a little later.
Hobbies:
Reading: I like the idea that before Nublar, Ben was a bookworm who preferred immersing himself in imaginary worlds to the real one.
Organizing: It doesn't sound like a hobby, but I can imagine that pre-Nublar Ben passionately (or compulsively) sorted objects like toys, books, etc.
Fantasy worlds: I think that as a child (or rather, before Nublar), Ben loved to immerse himself in fictional worlds. Especially worlds that he found exciting (pirates searching for treasure, he drew treasure maps for them, etc.), but that didn't frighten him.
Diagnoses:
Chronic iron deficiency anemia: In my imagination, Ben has undiagnosed ARFID (canonical fear of certain foods, brings its own symptoms, etc.) and therefore an iron deficiency he's had since childhood, which was also evident at the beginning of JWCC through his very pale skin, frequent malaise, and shortness of breath (also from panic attacks, but anemia can exacerbate this).
Anxiety and panic disorder/phobias: Ben definitely has a pronounced anxiety disorder (at the beginning of JWCC), which manifests itself in many situations (travel, animals, dirt, germs, food, self-confidence, social interactions, etc.).
Even after what was probably the most intense incident of his life (the fall from the monorail), Ben definitely still shows signs of his anxiety, just in a completely different, masked/altered form. But this is about the child Ben.
I could think of a few more things, but now I have to go to sleep!











