The benefits of coloring pages:
1) Self expression - coloring on a blank "canvas" (paper), is a way for children and adults alike to reveal themselves. You can inform a lot about the method a person is feeling by the images that they draw, the colors that they utilize, and so on. It is important to give children a chance to reveal themselves, and not all children reveal themselves through words and through writing, many usage art.
2) Color acknowledgment
3) Therapy - for many people (myself included) coloring is therapeutic. No matter whether it's scribbling, or coloring the "finest picture ever", coloring can be a way to de-stress, after a busy morning of school work, wind down, and relax, after the tensions of a day at school or work.
4) Grip/Control - many children find out how to hold a pencil, pen, marker, or colored pencil, by first learning how to hold a crayon. The small muscles needed for penmanship later start to be developed while coloring.
6) Building motor abilities
7) Focus - Focusing on a single job for a length of time is essential for coloring and for all sorts of things throughout one's life.
8) Boundaries - Another thing that children learn from coloring pages, with preprinted images on them, is how to accept borders. While a young child or preschooler might doodle all over a coloring sheet, without any regard for the borders (lines on the coloring page), as the child gets older, they will start to respect those lines, and make an effort to color in between them. While I motivate blank paper coloring for free expression as frequently as possible, for many young children pre-printed coloring pages are their first direct exposure to printed borders. This early direct exposure to borders in print, will be a big help when handwriting time comes around, and the child has to respect the borders of the preprinted handwriting lines on the paper.
9) Milestone - This is the last little "importance" of coloring that I will discuss in the meantime, and that is that coloring in the lines is a milestone, a sense of achievement, the first step towards a successful scholastic career for many children. For many children coloring in the lines is just as essential as counting to 10, counting to 100, reciting the alphabet, learning the multiplication truths, and so forth. It's a milestone that says "yes I can" do whatever I come across, and it provides children with pride, a sense of self worth, and assists them to feel accepted in a society that is frequently quick to judge, and slow to respond. This sense of achievement will bring them through life, and assist them not to give up so easily, when something brand-new comes along.