Nice project Karen and as others have said, ideal for the "older generation".
Now if you could just make the flash card look like a cassette...
You can still get the "granny" mobile phones here in Oz, you just wont find them on display (they want to sell you the all singing, all dancing modern fandangled stuff), you have to ask and they will slink off and pull one from a remote draw at the back of the store.
We've got one in the Mens Shed with large buttons, alarm and torch function.