Casey the Crocodile is having toothaches. Her friend, a plover bird, offers to help her pull out her bad teeth. But is it a good idea to fly into a crocodile's mouth? Follow the crocodile's dreadful week by the river and learn how to add and subtract. Read fun facts about Nile crocodiles! Jump start your child's advancement in numeracy with the Happy Learning Math series. Your child will delight in the fun stories about animals and encounter Math concepts, such as ordinal numbers, counting, skip counting, addition, subtraction and more. Materials for interactive play and links to printables are also included, turning each book into a hands-on experiential learning tool. Fun Science facts are also weaved into each story to spark your child's curiosity about the world. This book comes with bonus fun and interactive elements to reinforce your child's learning of Math concepts!