A boy was taking care of his baby sister while his parents went to town shopping. He decided to go fishing so he took her with him. 

 
"I'll never do that again!" he told his mother that evening. "I didn't catch a thing!" 

"Oh, next time I'm sure she'll be quiet and not scare the fish away," his mother said.

The boy said, "It wasn't that. She ate all the bait."