These postcards make some pretty fine small art reproductions, if you just want to pin them to the wall or lean them against those 'How to Destroy the Earth' books on your shelf.
But because they are postcards, after all, they've got customizable text on the back - for a message, and for an address. You can change the text that's printed there to anything you like.
So if you want to send out announcements or invitations to an event, just change the message and delete the address text - so you can address them each individually.
Or if you want to send a one of a kind retro robot greeting to one person, change the message and the address to what you'd like. Anything you'd like....
I can remember getting a postcard in the mail once with no address at all - just a map to my house! - but, you know, that may not work every place, or every time.
Ah... I digress. When you click on a card's image, you can change the text in those two areas. If you'd like to move things around, or change fonts or colors, just click the "Customize It!" button.