One day little Johnny comes in from the playground and writes the word “pen!$” on the board in a block letter very small.
So the teacher comes in and erases it and looks around the class for a guilty face.
So the next day he does it again but bigger and it’s taking up half of the board.
So she erases it and looks around the class for a guilty face and doesn’t find one.
So finally the third day little Johnny write pen!$ on the board in big block letters covering the whole board.
The teacher erases is and says,
“what’s up with this word?”
Little Johnny stands up and says,
“the more you rub it the bigger it gets”