Join Buster and Lass and their undersea friends for a special counting adventure! It's a fun and different way to learn number skills. Instead of focusing on simple 1-2-3 skills, this book focuses on number sequencing and grouping by 4s and 5s. The ability to groups items and count in multiples is an essential skill for your child's development and forms the basis of many more advanced number skills. This Bugville Learning Adventure, written by best-selling author Robert Stanek, is designed to build number sequencing and grouping skills.