"That'll be lots of fun!" chimed in Freddie Bobbsey, who was Bert's small brother. "We can make a man, and then throw snowballs at him, and he won't care a bit; will he, Bert?"

"No, I guess a snow man doesn't care how many times you hit him with snowballs," laughed the older boy, as he tried to catch a dog that was leaping about in the drifts, barking for joy. "The more snowballs you throw at a snow man the bigger he gets," said Bert.

"Oh, Bert Bobbsey, he does not!" cried a girl with dark hair and sparkling brown eyes, as she ran along with a smaller girl holding her red-mittened hand. "A snow man can't grow any bigger! What makes you tell Freddie so?"

"Course a snow man can grow bigger!" declared Bert. "A snowball grows bigger the more you roll it in the snow, doesn't it?"

"Yes," admitted Nan—Nan being the name of the brown-eyed girl, Bert's twin sister. "I know a snowball grows bigger the more you roll it, but you don't roll a snow man!" went on the brown-eyed girl.

"Ho, ho! wouldn't that be funny?" laughed the little girl, whose hand
Nan held.

"What would be funny, Flossie?" asked Freddie, and one look at the two smaller Bobbsey children would have told you that they, too, were twins. In fact the four Bobbseys were twins—that is there were two sets of them—Bert and Nan, and Flossie and Freddie. "What would be funny?" Freddie wanted to know. "Tell me! I want to laugh."

"Yes, you generally do want to laugh, little fireman!" and Bert Bobbsey laughed himself as he gave his small brother the pet name that Daddy Bobbsey had thought up some time ago. "But, as Flossie says, it would be funny to see a snow man rolling around in the drifts to make himself bigger," went on Bert.

"But you said he'd get bigger if we threw snowballs at him," insisted
Nan.

"And he will," went on Bert. "You see, a snowball gets bigger when you roll it around the yard, because more snow keeps sticking to it all the while. And if we make a snow man and then throw little snowballs at him, these snowballs will stick to him and he'll grow bigger, won't he?"