Kid notices something that most of us wouldn't have

Same with the dinoco petrol station in Toy Story 4

they just reuse 3D animations because they cost time and effort and they thought nobody would notice in a shitty movie like Cars 2

You’re gonna talk about the leaves and not the fact the trees haven’t grown at all?

What if in "UP" instead of travelling to another country they skip into the cars dimension and just never see a car?

what if the cars universe isnt its own universe at all and is just another country in the UP universe

You're blowing my mind here

From memory, the Up one is prolly about 30-40 min in, seems like it’s just when they get to the new land place.
From Cars 2, maybe about the same? I think it’s when they first meet Axl.

gotta look this up, brb

nup, couldn't find that scene in Cars 2