Why do young children whine? What can parents do about it before the whining drives them crazy? Whining seems to be an “innate” behavior, sort of between crying and speaking. Kids come into this world with all the necessary equipment to cry and they are also programmed to learn language.

THE BEST WAY TO STOP WHINING IS TO CHANGE RESPONSE BEHAVIOR IN THE PARENT.
Here are the Heins' suggestions for dealing with chronic whining:
When your child whines, never give in to the child. Establish a firm rule: we do not give the child anything unless it is asked for in a non-whining tone of voice.
Try to prevent whining by keeping the child from getting overly tired or hungry.
Try to eliminate the child's need to whine by really listening when the child properly asks for your attention.