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.
Online printable coloring sheets though can be quickly delivered at the reception desk. That will reduce the anxiety for kids as they wait. It also enables the parents to be able to talk with other adults and not have so many interruptions. Sometimes online printable coloring pages can be offered for educational themes, holidays, or even coloring contests.
You can find hundreds of such useful coloring pages with biblical themes, alphabetical games and more variations for preschool kids. However mind that you would need good configuration of system and good printer quality with perfect cartridge for fine print quality. Also make sure that you command the fine print or best print for your printer while printing the biblical pages for best results and perfect line drawing.