The Christmas tree will be up until January 7, therefore you can go see the tree. You can also the see the window display at one of the many large department stores in Midtown, Manhattan, as well as take a bit of ice skating at either Rockefeller Center, Wollman Rink or Bryant Park.Good luck
yes the tree will still be up, while there you can ice skate at the rink by the tree also there are many shops to look at. Have lunch at the rainbow room there at Rockefeller center. See the christmas show at radio city music hall, (it goes till the 30th). Ice Skate at wallman rink in central park. See a show ( go to the tickets booth at 45th and broadway and get discounted tickets for that day.
See the show the Radio City Christmas Spectacular. The tree, go ice skating, black friday sales, ... anywhere u go in NYC will be fun.