The Magic School Bus (shortened to The Bus or simply Bus) is the eponymous high-tech, sentient, anthropomorphic school bus with Magicware that The Frizzles' class and Liz use to go on field trips. It is most often piloted by the Frizzle sisters or Liz, but occasionally, in the original PBS television series, one of the kids will take the wheel, or it will take on a shape (such as an animal) that allows it to "drive" itself. Along with its ability to travel on land, in water, through the air, and even deep space, it is also able to change its size (along with its passengers), shapeshift (Inside the Earth), and teleport (Pigs in the Wind).