not as such..but I write to very sick children from a charity called Post Pals and often the kids are big Disney fans. (the Disney princess' feature a lot

Some have been sent to WDW by the Make a Wish Foundation etc..These children love receiving letters and small gifts. I buy loads of little things when I go to WDW to send off to them. So if you have any spare writing time to write more about Disney do have a look at this charity, its not huge and they do wonderful things bringing smiles to the kids, even just sending a postcard from WDW cheers them up.
http://www.postpals.co.uk/find.php