It's not funny, but I didn't know that a toilet paper is a nontaxable item. I just buy it, not having to worry about getting taxed for it.

But, a Judge in Murrysville, Pa. awarded a woman today $100 plus court costs after being charged sales tax on toilet paper, a nontaxable item, at Kmart - Read more here.

What are other Nontaxable items in the U.S. that you can think of?