As Yellowted says, remember that giving in once when they are pitching a fit means they will try it again and again. Just like never giving in when they ask for candy at the check-out counter. You might also not reward a whiny voice by not giving in to that. You can tell them you will not give in--and they can whine and kick and scream until Doomsday. It does take a lot of patience and the ability to tune out sounds, though.