A boy asked his father what a boomerang was, so his father showed him a picture of a boomerang and explained that it was a weapon used by the Aborigines of Australia. “They throw it in such a way that it returns to them if it fails to hit the target,” he explained.
“I can do that with a coin,” said the boy. “I mean, I can make it return to me after being thrown.”
“I would like to see you do that,” said his father. “In my opinion, once money leaves one’s hand it never returns.”
But the boy proved him wrong. How?