Join Buster and Lass and their new sea horse friends for a special undersea counting adventure! It's a fun and different way to learn number skills. Instead of focusing on simple 123 skills, this book focuses on number sequencing and grouping by 2s and 3s. The ability to group items and know 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 bestselling author Robert Stanek, is designed to build number sequencing and grouping skills.