The Color by Number Books. Random Theme Brain Boosting Stress Relieving Activity Book for Kids 9-12 has pages of...you guessed it color by number! Color by number exercises is additional challenge to your child's ability to recognize colors and numbers - at the same time. Therefore whenever your child does color by number he/she will experience: A boost in overall mental acuity - The concepts of colors and numbers boost your child's logic and creativity which are located on opposite sides of the brain. Improved self-confidence - A child needs to be reassured of what he/she can do. This way a boost in self-confidence will be felt. A confident child is ready to take on the world and learn from its challenges too. Immediate relaxation - Focus is required when completing color by number exercises. A wrong move could end up ruining the entire masterpiece. When a child becomes focused on an activity he/she begins to forget stressful circumstances. He/She experiences a 360degrees in mood changes. This 200-page activity book comes in large print format (8.5 x 11 inches). It is recommended for older kids but younger ones are free to give it a try.