Gifted children are born with perfectionism. Teach a life skill that mini goals are healthier, more rewarding, build confidence and are realistic. Nobody is perfect! We are born with strengths and weaknesses and to work on your weaknesses as a child is so much easier than to deal with the consequences of perfectionism as an adult.
For more ways to reach children, check out How to Be the Best Student You Can Be and Homework Hassles and Cómo ser el mejor estudiante que puedas ser and Los problemas con la tarea.