The little boy runs into the house and comes back out with a can of hair spray. He sprays the worm until it is straight and stiff as a board. The boy then proceeds to put the worm back into the hole. The grandfather hands the little boy five dollars, grabs the hair spray and runs into the house.
Thirty minutes later the grandfather comes back out and hands the boy another five dollars. The little boy says, "Grandpa, you already gave me five dollars." The grandfather replies, "I know. That's from your Grandma."