The Biggest Caddis Worm's house was not well fastened together, and every day he said, "I really must fix it to-morrow." But when to-morrow came, it always proved to be to-day, and, besides, he usually found something more interesting to be done. It took him a great deal of time to change his skin, and that could not be easily put off. He grew so fast that he was likely to awaken almost any morning and find his head poking through the top of his skin, and, lazy as he was, he would not have the pond people see him around with a crack in the skin of his head, right where it showed. So when this happened, he always pulled his body through the crack, and threw the old skin away. There was sure to be a whole new one underneath, you know.