Sick day on 75th street

N has been fighting a 102 to 103 fever all day.  Other than blueberries and  dried mango all he has wanted to do is nurse.  At first i felt very conflicted...I was starting to wean my nursing addict son and now he needs extra liquids and food and he won't take anything else.  PLUS, the medical professonials are telling me that mother's milk is the best for him right now... I don't want to nurse a 2 year old (N is 18 months), what are some liquids (other than the highly sugary ones) that you can give your child when he is sick?