The Rockefeller Center ice skating rink has been featured in movies and television shows and is ubiquitous with New York Christmas. Skating is available throughout the holidays, including Christmas Eve. Prices vary depending on the time of day but you can count on admission running between $10 and $19 for adults and $7.50 to $12.50 for children. Skate rentals cost between $8 and $9, so if you are packing more than a couple of kids this could be a pricey option.
If you are in New York City, chances are good that you are within a few blocks of a play, ballet, concert or musical. There are several holiday shows to catch in New York. Acts that are more traditional include "The Nutcracker Ballet" and "A Christmas Carol," while the Radio City Christmas Spectacular happens annually and may show you something you have not seen before. Ticket prices and show times differ depending on the show and the seats.
New York City is home to one of the most robust and interesting shopping markets in the United States. There are hundreds of retail stores, each with its own strategy for catching tourists and other customers and getting them to come in and spend a little cash. While store hours vary from location to location, walking around with the kids and taking in some of the amazing window displays is an excellent way to burn spare energy and time between destinations.
If religion is important to your family and you find yourself in New York City on Christmas day or Christmas eve, you may want to stop into a local church for a service. Some holiday services in Manhattan require passes due to the overwhelming demand, but if you look around you should be able to find a church with an open service (though it may be standing room only). Speak with your hotel concierge for advice on nearby churches and services.