It's the last day of school before the winter holidays and Wanda plans to see the Nutcracker ballet. But during a trip to a recycling plant that belongs to Murph (Dolly Parton), the toy soldier she needs to get into the theatre accidentally gets recycled! Devastated, Wanda wishes for a world without recycling. Ms. Frizzle activates the bus's un-recycler, taking the class and Murph on a song-filled field trip. The importance of recycling hits home when the bus's magic unrecycles everything in Walkerville — including the bus itself, as it too was made from recycled objects! Will the kids find a way to reconstruct the bus in time for Wanda to get back to see the Nutcracker? (Dolly Parton sings an original song plus four special carols written by Peter Lurye, composer of the rollicking MAGIC SCHOOL BUS theme song.)