"A dog?"
"Nope."
"A turtle?" guessed Mun Bun, who didn't quite know what it was all about, but who wanted to guess something.
"Nope!" said Laddie, laughing. "I'll tell you. It's the keyhole!"
"The keyhole?" cried Russ. "No!"
"To be sure!" answered his small brother. "Doesn't a keyhole go all the way through the door? If it didn't you couldn't get the key in. The keyhole goes through the door, but it doesn't come into the room nor go out. It just stays in the door. Isn't that a good riddle?"
"Yes, it is," answered Rose. "I'd never have guessed it."
"I thought it up all myself while you were talking about a door to this bungalow," said Laddie. "What goes through the door but doesn't come in the room? A keyhole," and he laughed at his own riddle.
The next day Cousin Tom went down to the beach, where once more Russ, Rose and the others were playing in the driftwood bungalow, and called:
"How many of you would like to go crabbing?"