Answer:
It is the great nemesis of the lactose intolerant.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
The person who makes it has no need for it. The person who purchases it does not use it. The person who does use it does not know he or she is. What is it?
Take one out and scratch my head, I am now black but once was red.
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
Often cooked as fillet, this meat comes from an animal that swims underwater.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?