Pixar unveils Easter eggs from its biggest movies

Just in time for Easter, Pixar is out with an Easter egg hunt of its own, unveiling some of the hidden references placed in many of its biggest movies.

Ever since the studio's first movie ('Toy Story') came out, the company has been hiding lots of sneaky little 'treats' in their films. The concept of adding an 'Easter egg' to a film isn't new: Slate points out that it happened as far back as in " 101 Dalmatians, which features blink-and-you'll miss them cameos from several Lady and the Tramp characters."

In the video, Lee Unkrich, the director of 'Toy Story 3,' mentions the Pizza Planet truck and A113, the famous classroom at California Institute of the Arts where many Pixar directors went to school. A hint for the first few spots? Keep your eye on that bouncing ball ... it appears in a lot more films than you probably ever realized.

There are tons of references from Pixar movies past and probably some teases of movies yet to come in this clip. How many can you spot?

Check out the full video here: