Recycled humor from Stan Kegel, the author is not known.

“What’s your father’s occupation?” asked the school secretary on the first day of registration.

“He’s a magician,” said the new boy.

“How exciting. What’s his best trick?”

The boy said, “He saws people in half.”

“How impressive! Now, do you have any brothers or sisters?”

And the boy said, “Yep, one half brother and two half sisters.”