Today most homes have a printer on hand and that makes it fast and easy to use online printable coloring pages. They don't take much ink either so you can find the value is there all the way around. If you don't have a printer at home you can often use those at the local library to print the coloring pages for a very small fee.
However, it isn't just at home that they come in handy. Many professional offices take care of children. There are also parents that have to bring their children along with them for business. It may not be ideal but they often can't afford child care or it is hard to find someone to watch the youngsters so they can take care of things.