These are various cards provided along with envelopes (the envelopes themselves had no markings of the resort on them) to send greetings to your friends and family back home. All you need to do is then stamp it, and make your way to the fantastic mailbox located in the Great Ceremonial House to send it off. I, for one, would just hoard them for myself, and I am glad I did.
It is easy to overlook some the individual offerings that were once presented to guests, which we now longingly look upon as relics that occupy our minds with wonderful thoughts when we think about the Walt Disney World of the past. Thanks for looking, and let us never forget the things that made us fall in love with Walt Disney World in the first place.