You can find many clip arts with slightest modifications yet with different subject matters either, thus there is a continuing process of preparing, producing and using of these school clip arts by a lot of people. With everything else changing so fast, I believe it is valuable to retain some things essentially as they have "always" been. If your little one is fascinated by Disney characters such as Donald Duck, Mickey Mouse or Tinker Bell, you can selectively choose to print coloring-pages on this particular theme. Cartoon characters tend to constantly fall in and out of fashion. If the current trend is that of Ben 10 or the Incredible, you can easily generate hundreds of printable coloring sheet based only on these cartoon characters. The minuscule effort it takes to compile an on demand coloring book is worth the smile on your child's lips.
There are so many online printable coloring pages that you can have a blast offering them to your children. Perhaps you don't have children of your own but you often have friends and family that come over with their young ones. You don't want the kids to be bored at your house. Allow them to pick some coloring sheets that you can print for them. Have crayons and other supplies on hand for them and they will feel very welcome in your home.