Laddie. "That's a paddle-wheel!"

"Why doesn't it go 'round then?" asked Violet, Laddie's twin sister. "Why
doesn't it go 'round, Russ? I thought wheels always went around!" Vi, as
Violet was usually called, loved to ask questions, and sometimes they were
the kind that could not be easily answered. This one seemed to be that
kind, for Russ went on whistling and did not reply.

"Why doesn't the footstool go around if it's a wheel?" asked Vi again.

"Oh, 'cause--'cause----" began Russ, holding his head on one side and
stopping halfway through his whistled tune. "It doesn't go 'round?"

"Oh, I got a riddle! I got a riddle!" suddenly cried Laddie, who was as
fond of asking riddles as Vi was of giving out questions. "What kind of a
wheel doesn't go 'round? That's a new riddle! What kind of a wheel
doesn't go 'round?"

"All wheels go around," declared Russ, who, now that he had the footstool
fixed where he wanted it, had started his whistling again.

"What's the riddle, Laddie?" asked Vi, shaking her curly hair and looking
up with her gray eyes at her brother, whose locks were of the same color,
though not quite so curly as his twin's.

"There she goes again! Asking more questions!" exclaimed Rose, who had
come back from putting away the broom, and was ready to play the steamboat
game with her older brother.

"But what _is_ the riddle?" insisted Vi. "I like to guess 'em, Laddie!