Up and Down is an educational short film directed produced by Pixar for Sesame Street featuring the character of Luxo, Jr., originally from the short film Luxo, Jr.. Directed by John Lasseter, the short built upon the original film, focusing on little Luxo discovering the concept of "Up" and "Down" with the help of his dad, Luxo, Sr. The short was included on the Pixar Short Films Collection DVD and Blu-ray.
In the short, Luxo Jr. demonstrates "up" and "down" by jumping on and off of a cardboard box until he falls through.
Sesame Street producer Arlene Sherman recalled how the shorts came about stating: "With Pixar, I was helping to train their animators for Toy Story. They needed to gear up a lot of people, so the Pixar people and I had a mutual feeling about the show and sensibility, and so I would never know when I was getting another animation. I would approve the storyboards, then I would get these packages in the mail, with these wonderful Luxo Jr. pieces. I've had to work a lot with relationships, and use the good feeling that Sesame Street is promoting. Working as a producer is a real advantage there, because people want to work for the show."