Have you ever wondered why rivers and streams are so important to life on Earth? Without them, humans, plants, and animals would not have the food, water, and power we need to survive. In this exciting science book, you will explore how rivers change the shape of the land and how we, in turn, change the shape of our waterways. Get ready to roll up your sleeves and become a scientist. You will find twenty-five hands-on projects that let you test real science concepts right at home. You can investigate a local watershed, look for tiny life forms in water samples, model how insects walk on water, and even build your own water wheel. Along the way, you will discover fascinating facts about how waterways connect to human history and the ecosystem. You will also learn about climate change and how it affects our rivers. It is up to us to think creatively and find ways to keep our streams healthy. With fun facts, cool illustrations, and exciting experiments, this book gives you everything you need to understand one of our planet's most vital resources.