Suitable for training humorous jokes

When an old man was dying, he called three children who were often in conflict to the bed and handed his eldest son a chopstick, saying, you break it, and the eldest son breaks it. He handed the second son three chopsticks and said, Now you have broken them, and so has the second son. The old man struggled to hand in ten chopsticks. As a result, his youngest son was broken and the old man died with a grudge.