My DS who's nearly 4 is always complaining he's hungry and the constant whining is doing my head in! He usually has two snacks between each meal (fruit, cereal bar, dry cheerios etc). I'm worried he eats partly out of habit ('is it 10 o'clock yet?' and 'I usually have two things' are things he often says), plus dd always wants something to eat when ds has something but he always mentions food first (she is 2.5). He's not at all overweight or anything, so should I just let him have something to eat if he says he's hungry?