I have watched Toy Story, 1, 2, and 3. I had never figured that the movie is tightly wound into itself and that there could be a prequel. Jon Negroni has too much time on his hands, but he also figured out the clue that tells us how Andy's Mom is part of the whole story.

According to Babble.com, Jon Negroni theorizes that Andy's mom, who would have been a child in the '70s, is the original owner of Jessie, Woody's cowboy sister who we meet with Stinky Pete in Toy Story 2. Jessie reminisces about a girl named Emily who loved and played with her.

I just so happens that Andy's mom is named Emily.

Negroni also notices, In the flashback that Jesse shows us how she was separated from her owner, Emily wore a red cowboy hat with white laces. Later in the movie Andy wears that same hat when he's 6 years old, except the hat band is faded or missing on his hat. Negroni theorizes that Andy's mom gave this hat to Andy. It's not a Woody hat. Woody's hat is brown and doesn't have white laces. Andy's mom gave him the hat that she wore as a kid.

I love the franchise but this theory makes it more fun. Now, I am going home to watch all of the movies to see if I can catch any of these clues.