Good for you, PointsJunkie!!!
A few years ago our Girl Scout troop went down to Orlando and worked at the Give Kids The World community for 5 days. They have plenty of volunteers during the winter, thanks to the many wonderful senior citizens who donate their time, but a lot of the snowbirds head north for the summer to escape the heat, so it's an optimal time for families, scout troops and church groups to head south and take over to help run the place in between visits to The Mouse House.
http://www.gktw.org/
Give Kids the World is a wonderful place. It's a little "village" where sick kids can come and visit with other kids who understand about pain and needles and baldness. The families stay in individually decorated houses that are built to be comfortable and homey but with all the amenities of a hospital. A little train is driven throughout the village all day long picking up kids and bringing them to the pools or towne square. (I was the most excellent train conductor.) The towne square has a cafeteria, a Make A Wish castle, an arcade, handicap accessible rides, and an ice cream shoppe that is open from dawn til dusk.
GKTW has agreements with Disney and SeaWorld and Universal for the families to get into the parks for no cost as well. And then each night cast members from the different theme parks visit the towne square to entertain the kids and their families who are too sick to travel anywhere.
All of it is 100% free to the families, including the airfare. (For those with extra Frequent Flyer Miles, Make A Wish is a great organization to donate, too). They try to accomodate as many kids as they can, but sometimes there is a critical need for accomodations because time is running out but no accomodations are available. That's when people like PointsJunkie enter the picture.
It's a heartbreaking and heartwarming place all rolled into one.