Each page goes something like this: "'Oink! Oink!' grunted the pig. 'Want to roll in the mud?' The spider didn't answer. She was very busy spinning her web." Simple as that. But think of everything we've learned from that simple exchange. We've been introduced to a picture of a new animal and know what the animal is called. We know what kind of sounds the animal makes and a characteristic or behavior of the animal. Pretty great, huh?
In the end the spider finishes her web and we learn a characteristic of spiders-- "And the spider caught the fly in her web...just like that!" And now we know what spiders look like and what spiders do. Just like that!