The Fart Box (La Caja de Flatulencia in Latin Spanish) is a box which makes a fart sound when the red button on it is pressed. It was originally part of a robot that tried to destroy the ninja. Randy and Howard used it for their science fair project. It also was able to bring potatoes to life as seen in the episode Attack of the Killer Potatoes. Mrs. Driscoll gave them an F for it but after they accidentally solved the school's food shortage problem, they got a passing grade for their project. Randy and Howard laugh while pressing the button whole night.