Well, there are plenty of fun activities to do in Chicago on Christmas Day! You could visit Millennium Park and ice skate at the McCormick Tribune Ice Rink. Or you could explore the Museum of Science and Industry, which has a variety of interactive exhibits and activities for all ages. If you're feeling adventurous, you could try sledding down one of the many hills in the city, or even take a horse-drawn carriage ride through the beautiful neighborhoods. And don't forget to try some of the delicious holiday treats, like gingerbread, hot cocoa, and candy canes!