Tolkien's Letters from Father Christmas - Enhanced Edition

I was researching some eBooks online and found this video of 'Tolkien's Letters from Father Christmas'. It features scanned in letters that have been hand written, which are to provoke the child into thinking Father Christmas has wrote them. I think it would be really exciting for children to read these and there is something authentic about them. The envelopes are also included and you can see where the letter was being sent and they feature little illustrated stamps. It’s very effective as it makes the story realistic and brings intrigue to young viewers. I like the idea of them having to open letters or a map on the screen; this is one method of interaction that I could consider.