My ds1 aged 3 is in 1.5-2 years trousers. He also complains of tiredness alot and does not seem to have much energy. He complains sometimes as early as breakfast that his legs are tired and he wants his bed. Falls asleep at the drop of a hat often on the carpet. At other times he is "full on" as my dh said and racing around just like he should at the age of 3 but its not long before he's tired again. Does not eat much. He is starting playgroup soon and rather concerned about this. Any advise anyone?