Postcard sketch
 
If you wanted to see the demo postcard a little more closely, here it is. This sketch is, I think, an ocelot? I have a massive folder of ref photos I keep in my dropbox so I can access at any time I'm looking to draw something, and I saved this cat photo from Reddit. No, those eyes aren't exaggerated, the thing had MASSIVE eyes! Maybe I'll do another, more-detailed version from that photo soon if people like this one enough.