After each lesson, students are rewarded with a great new Reading Eggs critter to add to their zoo. This collection continues to grow, the more reading lessons they complete. Children love collecting and our cute critters are fun to watch and fun to collect. The Reading Eggs critters also have a fun learning to read connection – students can go to the Critters page and check out each critter card's information, which builds knowledge of the letter or sound that was the focus of the lesson.