“Now, Frank, you can answer your own question, I think—‘Why does the caddis worm build a house?’”
“Because he has a soft body.”
“Quite right. But why is he forced to protect his body?”
“Fishes would eat him.”
“Right again, Frank. If trout could speak, they might tell you that the sweetest morsel in the stream is the caddis worm. Now, take your lens, please, and tell me something about him.”
“His body is divided into rings, and there are the same number of them as we found in the caterpillar.”
“Very good, Frank. Now give Tom a chance.”
“His head and the first three divisions of his body are hard cased. They are black and yellow in colour.”
“He has six legs,” said Frank, “and they are attached to the first three divisions of his body.”
“What about the last division of his body?” Uncle George asked.