"Very well; but don't go into the water, and don't step into any of the boats until daddy comes."
"We won't," promised Bunny Brown and his sister Sue. Their mother could always depend on them to keep their promises, though sometimes the things they did were worse than those they promised her not to do. They were just different, that was all.
Sue and Bunny went down to the edge of Lake Wanda. They could not see their father's boat, so they walked along the shore. Before they knew it they had gone farther than they had ever gone before, and, all at once, in the side of the hill, that led down to the beach of the lake, they saw a hole that seemed to go away back under the hill.
"Oh, what's that?" asked Sue, stepping a little behind Bunny.
"It's a cave," answered her brother.
"What's a cave?" Sue next asked.
"Well, a cave is a hole," explained Bunny.
"Then a hole and a cave are the same thing," said Sue.
"Yes, I guess they are pretty much," admitted the little boy. "Only in a cave you have adventures, and in a hole you only fall down and get your clothes dirty."
"Don't you ever get your clothes dirty in a cave?" Sue demanded.