Practice number recognition and distinguishing between odd and even numbers with these fun Christmas Worksheets. The first worksheet is a simple countdown to Christmas, which includes numbers 1-25. The second worksheet also includes numbers 1-25, but in random order. Both worksheets require students to identify odd and even numbers, and to use the color key to color the odd numbers green and the even numbers red. To color the numbers you can use Do-A-Dot markers, crayons, colored pencils, washable markers, or any other kind of coloring utensil.