S.S.
When my son started to whine, he's 3 now, when he was younger I would correct the problem then and there. There were consequences to whining. Not going outside, playing with favorite toys, etc. My son learned that whining got him negative results, but asking please and saying thank you gave him positive results. He has his moments but for the most part, he's doing great, as far as the whining goes, but potty training is another story...LOL.