Earthworm

An old man see a boy is play with earthworm.
Old man: I will give you $5 if you can put a earthworm into a whole.
Boy: Ok. He use spray on earthworm, then he put it into the whole.
One day later, Old man come to meet a boy again.
Old man: Here you are $5 more; grandmother give to you good boy.
Boy: Thank you.