It isn't something an activity of daily life, even it can be a best thing for your child's birthday party. You can use your free coloring sheet to have a coloring contest where of course everyone wins a prize as another fun activity. Keep in mind that these are coloring page which you can keep in your kid's scrapbook forever. This simple activity will become something that can be passed down from generation to generation.
You have a greater tool - your PC - that can be helpful to get the printouts of diverse colorful sheets. Guide the children, exclusively during the holidays to add illustrations to the colorful-page, and showcase them around the prominent places of the house. This will give them, a sense of pride and joy for their creativity, and would lead to further productive pursuits. Thus, you will witness that there are massive advantages of coloring-page relatively to coloring books. Coloring sheet are economical, costing you only a couple of cents in ink and paper rather than a few dollars for a coloring book.