According to www.couponingtodisney.com , if you write a letter to Disney, they will send you back an autographed post card! I love this idea, way to go, Disney! 

Send your letter(s) to: 

Walt Disney World Communications P.O. Box 10040 Lake Buena Vista, FL 32830-0040

Source: http://www.couponingtodisney.com/write-a-letter-to-your-favorite-disney-character-and-get-an-autographed-picture-in-return-4/