Here is a mock up of the Shark Week invite -
Moo or Vista Print and have them look totally profesional.
Double click the small blank invite to open the photo in a new window, then right click and save to your computer. You can add your own text in Photoshop or even in Word if you're going to be printing them yourself at home. Or, better yet you can upload and add text on Picnik, seriously, I heart Picnik.