Try to use a themed coloring. For example, a series of coloring books about animals, buildings or machines give children an idea of the objects of the world. Coloring of fairy tales or cartoon characters, are good because they allow the child to "talk" with their favorite characters and express their attitude towards them through colors.
Coloring has always been children's favorite hobby. Many psychologists believe that the coloring can develop knowledge, improve motor skills and creativity at an early age.