What is that thing in the toilet?

As my son first began to finally use the toilet doing the unspeakable, he made a game of it. Each time he went, he called my name across the house. When I reached the bathroom, he pointed into the toilet. The first time, he said, "Look! It's a french fry!"
The next day, he called me again to say, "Look! A hashbrown!"
The next day, he called to me again to look and said, "Look!" I said, "What is it this time?" He said, "Ummm...a shark!" lol
After he heard me tell my mother what he said, he changed it. He still called me to look, but when I asked him what it was, he said, "Uhhh...poopoo." And the next time, he said, "Uhhh...black poopoo." lol
I suppose I embarassed him telling someone else, so the fun was over.
What a unique little imagination!