Coloring, of course, cannot be banned. You should not exclude its use for fine motor skills; this activity allows parents to get an extra half an hour of free time.
The benefits of coloring books for kids cannot be overestimated. It's not just entertainment, which can permanently keep the child interested, but also gives some free time for parents to make all necessary household chores; it is also an excellent developing material. Combining a game and a hobby such «coloring pages» will help improve the child's imagination, develop creative skills, visual memory and fine motor skills that will prepare a child's hand for the writing skills.