I found a childrens book called "Mommy Is Too Tired To Play" by Marc Archambault. I wish I had this book to read to my children when I was at my sickest as children just don't understand when you can't get out of your chair. I spoke with the author and he is donating a portion of the proceeds to the Whittemore Peterson Institute. You can check it out at the link below.
http://stores.lulu.com/mzadragon
http://stores.lulu.com/mzadragon