Complaining is A Help Me Be Good Book by Joy Berry for ages 3 - 7 that explains the difference between constructive and destuctive criticism. It also teaches children when complaining is and is not helpful.
Help Me Be Good About Complaining is a self-help book for 4-8 year old children. It deals with the behavioral issue of complaining and offers practical, down-to-earth advice on ways to overcome this behavior.