Further Elaboration

I have watched pixar's collection of films now in order to grasp a better idea of their signature,
From thought it would seem that Pixar has actually added references to other films in their entire collection in order to imply that the films all cohabit within a contained universe, such as the ant hill in 'A Bugs Life' and the Sea life in 'Finding Nemo' all being part of the same world that the characters from such films as 'Toy Story' and 'The Incredibles' all live in.