This article is about the train car. Did you mean the episode?
The Crystal Car is a train car that appears in the episode "The Crystal Car."
This car is a world made entirely out of crystals, from the landscape to the inhabitants. The car is also home to natives such as a crystal man named Greige and a crystal Giant, both of which are unable to speak with words, but can use gestures and actions to portray what they are attempting to say.