Here is the NYBG's description:
Wrapped in the glow of twinkling lights, model trains and trolleys zip along over bridges and on winding tracks past scaled replicas of New York landmarks. Orange slices, cinnamon sticks, poppy pods, pine cones and other plant parts make a festive brew as the materials used to create the more than 140 architectural reproductions. Among the favorites are the Empire State Building, the Little Red Lighthouse, the Brooklyn Bridge, and the borough’s own Yankee Stadium. The sounds and sites of locomotives with names such as Holiday Steam Engine and the North Pole and Snowflake Railroad evoke more magic than even Hogwarts Express.
New to the show this year are two famous gateways to New York: Ellis Island, the symbol of America to the 12 million immigrants who passed through its doors from east of the Atlantic, and the George Washington Bridge, the 75-year-old portal to New York for those west of the Hudson River.
Admission is $20/adults; $18/seniors and students; $10/children 2–12. FREE for Garden Members and children under 2. Buying tickets in advance is recommended, as this is a popular show. Info is at the NYBG Web site. The show is open during regular Garden hours.