"Yes," was the answer of the children's uncle. "Go ahead."
"What is it that goes through——"
"Oh, don't ask him that one about what goes through a door but doesn't come into the room!" exclaimed Russ.
"I wasn't!" asserted Laddie. "That's an old one, and the answer is a keyhole. I was going to ask him a new one."
"Well, go ahead," said Uncle Fred.
"What is it goes through—— No, that isn't it. Let me see. I almost forgot. Oh, I know! What can you drive without a whip or reins? That's it. What can you drive without a whip or reins?"
"Do you mean an ox?" asked Uncle Fred. "I've seen oxen driven, and the man who drove them didn't use reins as they do on horses, though he did have a goad, which is like a whip."
"No, oxen isn't the answer," said Laddie. "Do you give up?"
"Well, I will, just to see what the answer is," replied Uncle Fred.
"What is it you can drive without a whip or reins?" asked Laddie again. "The answer is a nail. You can drive that with a hammer."