The traditional way of learning to color pages was to draw and then color however in this day and age children have drawing books with pre-drawn pictures that they can color. Description from onlycoloringpages.com. I searched for this on bing.com/images
Colouring in is a great activity for kids and Kidspot has hundreds of free printables that you can print out at home and give to your child to colour in with crayons, markers and pencils. There are all kinds of themes and patterns to enjoy.