Pixar is a company that makes movies that you might have seen before. They use computers to create these movies, and they are really good at it! You know how you can draw a picture with a pencil and paper? Well, Pixar uses a computer to do that same thing, but they can make the pictures move too! It's kind of like when you watch a cartoon on TV, except the cartoons look like they're real!
Pixar started a long time ago, in 1979, when some really smart people got together to make computer graphics. They wanted to use these computer graphics to make movies, so they started working with a company called Disney. That's why you might have seen some Pixar movies with the Disney logo on them!
Pixar has made a lot of movies, like Toy Story, Finding Nemo, Up, and The Incredibles. They spend a lot of time making these movies, because they want them to look really good. They use special software and draw each part of the movie one piece at a time. They also have people who write the story, come up with ideas for how the characters should look and act, and make sure everything fits together perfectly.
So when you watch a Pixar movie, you're watching something that a lot of people worked really hard on, and they want you to have fun and enjoy it!