Pixar Easter Eggs: From Pizza Planet To Binford Tools, The Best Pixar Hidden Gems (PHOTOS)

Over the weekend, Pixar released "Brave", the studio's first non-sequel since "Up" in 2009. "Brave" marked the studio's first foray into the fairytale genre and -- more notably -- its first film with a female protagonist, Princess Merida. Audiences were pleased with the new direction: "Brave" earned $66.3 million in ticket sales.

With a string of beloved movies ranging from "Toy Story," "Finding Nemo," and "Ratatouille," Pixar has built its reputation on making quality films that fans know will be entertaining, funny, and touching. What most fans might not know, however, is that Pixar films are riddled with easter eggs -- hidden gems and pop culture references.

Below, check out HuffPost Entertainment's easter egg slideshow and contribute with slides of your favorite Pixar easter eggs!

• The Pizza Planet Truck

  Appearing in almost every Pixar feature film, The Pizza Planet Truck, first spotted in "Toy Story" and shown here in "Wall-E," is one of the most ubiquitous yet hardest to spot of Pixar's many easter eggs. Eagle-eyed viewers may have also seen it in "Brave."

• The Luxo Ball

  Arguably the most identifiably Pixar easter egg, the yellow ball adorned with a blue stripe and a red star, known as the Luxo Ball because of its original appearance in the short film "Luxo Jr.", has made its way into no less than 11 Pixar films and shorts including "Toy Story 3."

• John Ratzenberger

  Perhaps the only thing Pixar loves more than the Pizza Planet Truck, John Ratzenberger has voiced a character in every Pixar film. Lovingly referred to by Pixar's chief creative officer, John Lasseter, as the studio's "good luck charm", some of Ratzenberger most famous roles include Hamm from the "Toy Story" films and P.T. Flea in "A Bug's Life."

• A113

  The code A113 (pronounced A1-13) has also appeared in almost every Pixar film. Though seemingly random at first, the code was the classroom number used by the character animation students at the California Institute of the Arts where many of Pixar's chief animators studied. Look closely for the code in "Monsters Inc." Apparently, that's the only feature film to explicitly feature the classroom number.

• Boo's Toys

  Though most audience members were too busy crying at the end of "Monsters Inc." to notice anything suspicious, those who could see past their own tears watched Boo give away three of her favorite toys to Scully. The toys were the Luxo Ball, Jessie the Cowgirl doll from "Toy Story 2," and a Nemo toy from the yet to be released "Finding Nemo."

• Binford Tools

  Pixar may love inside jokes and easter eggs, but that doesn't mean the studio doesn't throw in a pop culture reference every now and then. Check out this still from "Toy Story" featuring a Binford Tools toolbox -- the same toolbox used by actor, and voice of Buzz Lightyear, Tim Allen on his show "Home Improvement."

• P.T. Flea's Wagon

  The studio's next movie, "A Bug's Life," stealthily payed homage to Disney's beloved film, "Dumbo". The wagon that transported P.T. Flea's Circus was an empty Casey Ford Jr. cookie box, named after the train that transported the Dumbo's circus in the 1941 Disney film.

• Apple

  We can only wonder if the late Steve Jobs, an owner of Pixar and executive producer of "Toy Story," noticed this egg: a race car -- sponsored by Apple -- in the film "Cars."

• Day and Night

  Look carefully, in the Pixar short "Day and Night," the "Day" character can be seen watching an old Western film. This is actually the same Western film that the dalmatian puppies from Disney's "101 Dalmatians" watch on their television screen.

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