It was the last day of school, and all the students were bringing presents for their teacher. A florist's daughter came up and gave her teacher a box.
The teacher said, I'll bet these are flowers!” The girl replied, “How did you know?"

“Just a lucky guess,” she said.

Next, a boy whose family owned a candy store came up and gave the teacher a box. She said that she knew it was candy. When the boy asked how she knew, she again said, “Just a lucky guess.'”

Finally, a boy whose father owned a liquor store came up and gave the teacher a box, but one of the box's corners was damp from a leak. The teacher asked the boy if it was wine. The boy said, “No.” She touched the leak and put it to her tongue and asked if it was champagne. The boy again said no.

Finally, she gave up and asked him what was in the box.

He said happily, “A puppy!”