Answer:
It is the electronic version of junk mail or a salty meat in a can.
What is put on a table, cut, but never eaten?
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
What's black when you get it, red when you use it, and white when you're all through with it?
I am round as a bowl, deep as a tub, but all the world's water couldn't fill me up.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?