""Where did the hot go?"" wonders Arnold when he finds that his hot cocoa has cooled. In response, Ms. Frizzle whisks the class to the Arctic! What's the freezing Arctic got to do with heat? While the kids try to find out, the bus's engine freezes and the bus floats away on an ice floe with Ralphie and Phoebe inside! As the bus moves away, so does the heat from everyone's body. How can Ms. Frizzle's kids insulate their body to keep the heat in? Can they rescue Ralphie and Phoebe before they all become the Ice Cube Kids?
Elenco: Daniel DeSanto , Stuart Stone , Erica Luttrell , Malcolm-Jamal Warner , Dan Tamberelli , Lily Tomlin , Frank Welker , Whoopi Goldberg , Susan Blu , Edward James Olmos , Andre Ottley-Lorant .