So my DD, 7, has thought of a foolproof way of discovering if fairies are real. She has a fairy door in her room and a mailbox and this is where the tooth fairy leaves her money and occasionally notes. So tonight she has written a letter to the fairy with instructions how to take a selfie with her tablet. I can't find a believable image for her so should I just leave it? I can't bear for her to be disappointed in the morning!