Ms. Frizzle's pet lizard. She is seen in a lot of the episodes and has sometimes been the focus of one.
- She bears a heavy resemblance to a Jackson's Chameleon.
- She talks in three CD-ROMs.
- She is the most seen pet.
- In "In a Pickle", her full name is mentioned to be Liz Ard.
- In "Spins a Web", the class refers to her as a female.
- She was the main focus of the episode "Cold Feet".
- She is shown to know how to operate the bus' ignition key in "Revving Up".