Discover Crabs in this Beginning Reader Let's head down to the beach and learn about crabs. Some crabs are big. Some are little. They all have hard outer shells. Beginning readers will learn all about crabs in this short, leveled reader. Here is an example of the text level: This is a crab claw. Crabs use their claws to fight, eat, and talk to other crabs. Discover Reading series books from Xist Publishing are created with digital and print reading in mind. Each page features a photograph with descriptive text leveled for early readers.