We've written before about Pixar's excellence when it comes to Easter Eggs in their movies.
You almost can't get through a single scene in their movies without seeing a small nod to one of their other masterpieces popping up in the background.
The Easter Eggs that have been pointed out in the past generally have come from Pixar mega fans but now the company themselves have gotten in on the act by compiling the below video which contains Easter Eggs that you've (probably) never seen before.
Honestly, some of them are so obscure you'd literally need to be pouring over every frame of the movies to pick up on them all. Take a look.