Rain, rain, rain! The rains came down. It is cold and damp. Earthworms! Oh, Nat! Chuck! Come look at the earthworms!"" Kids with the stomach to go on will hear the word habitat again (see Our Caterpillars, above) and learn about what earthworms need for theirs (though they might remain fuzzy about what ""castings"" are)--but Pringle's Twist, Wiggle and Squirm (1973) will tell them more about earthworms and make them want to read on.