My son, who is almost four, seems to go through periods when he just seems really fed up. He whines about everything, is very sensitive,is generally uncommunicative and difficult to please. I dont think theres anything wrong, its just his personality. I think alot of it has to do with jealousy/competition with his younger sister who is very outgoing and consequently gets lots of attention. Nevertheless it really upsets me and makes me worry because i feel he's not happy. These 'blue'periods can last for a few weeks at a time and then he seems himself again. This pattern - of being ok and then not ok- has gone on for quite a while. We do all we can to give him lots of affirmation, one on one attention but with two kids and both of us working it's hard. Does anyone have a similar experience. Sometimes it just helps to know that their behaviour is 'normal'