I've got one that my uncle used to tell.
It was at the end of the school year, and a kindergarten teacher was receiving gifts from her students. The florist's daughter handed her a gift. She said, "I bet I know what it is. Some flowers."
That's right" the girl said, "but how did you know?" "Oh, just a wild guess," she said.
The next pupil was the candy shop owner's son. The teacher picked up the gift, shook it, and said, "I bet I can guess what it is. A box of sweets."
"That's right, but how did you know?" asked the boy "Oh, just a wild guess," said the teacher.
The next gift was from the son of the liquor store owner. The teacher held the package overhead, but it was leaking. She touched a drop of the leakage with her finger and touched it to her tongue. "Is it wine?" she asked. "No," the boy replied, with some excitement.
The teacher repeated the process, taking a larger drop of the leakage to her tongue. "Is it champagne?" she asked. "No," the boy replied, with more excitement.
The teacher took one more taste before declaring, "I give up, what is it?"
With great excitement, the boy replied, "It's a puppy!"