"There she goes!" echoed the crowd. "Up goes the balloon!"
And up it went, taking Flossie and Freddie with it! Up and up it rose, shooting above the heads of the crowd.
"Oh, Freddie!" cried Flossie, "what's going to happen?"
"We're going up in a balloon!" shouted Freddie, and then he laughed. He thought it was fun.
"Oh, I want to get down!" screamed Flossie. She looked over the edge of the basket, as did her brother, and just then Mrs. Bobbsey glanced up.
"Oh, my children! Flossie and Freddie!" she gasped, pointing. "They're in the balloon!"
CHAPTER XVI
ON THE ISLAND
There was great excitement down on the ground when the cry of Mrs. Bobbsey told her husband, the other children, and the big crowd that Flossie and Freddie had been carried away in the balloon. At first some did not believe it, and even Mr. Bobbsey found it hard to imagine that such a thing could happen.