One of my favorite channels on youtube is the IEatWords channel. Right now, they are donating books to their local children's hospitals. Speaking as a mother of two, if any of my kids had a life threatening illness and had to be in and out of a hospital all the time, I would love if someone donated them some books. They are doing a great thing, and for every "like" on youtube, they will donate a dollar.
And, if you want to donate some money to the cause, they opened up a paypal account! Any little bit helps, and its for a great cause :)
Click here to see their blog post