One day a boy was playing in the garden of his house and his grandfather approached him:
Hey, what are you doing? Asked the grandfather.
The boy replied: I'm playing with putting worms back on the ground, Grandpa.
The amazed grandfather asked: but how do you put the worms back? they are all soft ...
It's a secret, but if you give me $ 10 I can tell you.
The grandfather agrees and then the boy says:
I take them off the ground, apply varnish, wait for them to dry and then put them back on.
The grandfather nods happily and finds it fair, pays the boy and leaves.
The next day the boy is playing in the garden, his grandfather approaches him once again and this time gives him $ 100.
The frightened boy immediately says: But Grandpa, you already paid me yesterday.
The grandfather promptly responds. oooooh noooo boy, this is from your grandma.