It is the day before the winter holidays .
The class is taking stuff to the recycling center , which is run by Murph ( voiced by Dolly Parton ) , Ms. Frizzle 's cousin .
It is the day before the winter holidays , and the class is taking stuff to the recycling center , which is run by Murph ( voiced by Dolly Parton ) , Ms. Frizzle 's cousin .