One of the blogs I read is called Attack of the Redneck Mommy. She is sentimental, sarcastic, hilarious, and sometimes even a bit crude. She has 3 children, one of which is medically fragile. He has a whole host of medical problems of which I am not going to list here. She recently blogged about his 'superpower' of invisiblity. It is completely heartwrenching.
Please, please read it for yourself.