Lab coin
A 3-D printed chunk of nonsense that only shows up in secret places. The people who hide them are called hiders and the ones who chase them are called hunters.
I found a lab coin in the toilet. I'm not proud. I'm just mad it wasn't the whole toilet.
My sister hides lab coins in the cereal. I found one in my bowl. I still have a headache from it.
I got stung by a lab coin. It was in the sock drawer. I still don't know how that happened.