When it comes to quality of life for children, Colorado ranks right in the middle of the 50 states. The Child Well-Being Index released by the Foundation fo rChild Development and Annie E. Casey Foundation is based on date from 2007. According to the Denver Post, the study looks at 25 indicators in seven categories, and found states with higher income taxes are better for children. In each category, Colorado children generally fared slightly better than the national average, with a few exceptions.