A.H.
He's wimpering because you are responding to what he wants. You are teaching him to whine. He can understand almost everything you say at this age and this is a good age or even late (and I was late to do it too) to start deciding rules and using discipline. They say, estimate what you think they know and double it. I'm just reading on book on whining and just took a parenting class so this is all very fresh in my mind. You need to decide what the rules are and enforce them and be consistent. Do it now otherwise it will only get worse and harder to control. I recommend the following parenting approaches - Love and Logic, Developing Capable Young People and Calmer, Easier, Happier Parenting (all have webpages). I've taken workshops and used their CDs and books. Invest some time NOW to read about discipline and raising kids and you'll never regret it.