i printed out a photo on regular printer paper - and then wished i had used nicer paper - but, it is just fake mail...showing how you can write on the background. the idea yesterday was to write on the face, but i couldn't bring myself to do that. it seemed like a cute idea for a thank you for someone who can't write yet. it could also be a party invitation. the possibilities for writing on photos are endless.
turning a piece of paper into an envelope:
google: envelope folding template and you will see many. Word has templates, too.