If you love to receive letters in the mail but don't have someone to become pen pals with, try signing up for the Mystery Envelope subscription. For the low price of $5 a month, Mystery Envelope will send you surprise envelope-sized goodies right to your doorstep.
The Mystery Envelope is a super cryptic subscription program that relies on your willingness to accept the unknown. The subscription doesn't specify what kind of stuff you'll be receiving each month, what brand makes the products or where they are being shipped out from. All the Mystery Envelope is willing to divulge is that you'll receive an envelope in the mail each month and that it'll be full of unknown goodies. Because of the confined size of an envelope, I assume the products would be pretty small but nonetheless exciting.