Grandpa, What's Corrosion? by Carlos ArroyaveA Fun Story About My Rusty Pencil Sharpener and Its Connection to Our Planet's FutureAnswering a grandchild's question can open the door for us to play a starring role in their lives. Reflecting on how best to respond to Alicia's curiosity-which inspired this book's title-brought back distant childhood memories and shared experiences with her and her little brother, Antonio. As I began recounting these stories, it became clear that the corrosion issues we faced in childhood connected perfectly with similar experiences that would help shape this book.This is a book for those who, in just a few decades, will take on the challenge of sustaining our planet. It offers an opportunity to nurture critical scientific thinking and practical engineering skills from a young age. Join us on a journey through time and space in search of realities that seem almost magical-so magical, in fact, that they inspire delightful stories for grandchildren everywhere. You'll find numerous real-world images from across the globe, complemented by experiments that spark creativity and empower readers to gain their own knowledge.We begin by remembering all that we owe to Mother Nature, recognizing that corrosion is simply the tendency of materials to return to her. We're using up our resources, and the Earth is running out of energy to give. It's urgent that we care for what we have, learn to prevent and control corrosion, and discover how to do so here. Without a doubt, there's a clear link between children's concerns and the quality of life they'll need to preserve and improve when the future is in their hands.With the excitement of explorers and a scientific, engineering mindset, readers will learn why and how their toys rust and find ways to prevent or solve such challenges. In the end, they'll be able to explain the connection between corrosion issues at the playground and the need to protect it-not just so we can keep having fun there, but also so Earth can continue to be our home.