Toy Story Wallpaper
This easter egg can be seen in all versions of the movie.
After WALL-E causes a traffic jam while chasing EVE on her way to the ships bridge, he helps a man back onto his chair and then hops onto a people mover.
In the very next scene we see the people mover passing a classroom full of children being taught by a robot. If you look at the floor of the classroom you’ll notice it’s a very similar design to Andy’s wallpaper in Toy Story 2 and 3.