Through thrilling experiment showdowns between characters full of personality, this book clearly and enjoyably explains the scientific theories and terminology found in upper elementary and middle school textbooks, while also covering key scientific principles. It's perfect for boosting children's interest in science and their spirit of inquiry. In particular, the included 'experiment kit' lets kids actually try out the experiments featured in the book, so learning goes beyond simple memorization of theory to hands-on results they can see for themselves. For kids who already love science, this book will be a great friend; for kids who find science difficult, it will be an excellent science teacher. Chapter 1: Rivals Reunited Science Point: The relationship between density and buoyancy, the density of air Home Experiment: Sinking vs. Floating Tangerines, Floating Raisins Chapter 2: Genius Won's Three-Stage Transformation? Science Point: Buoyancy of gases, the difference between hot air balloons and gas balloons Scientists Who Changed the World: Jacques Charles Chapter 3: Ran's Challenge Science Point: The buoyancy of paper boats Science in Everyday Life: Buoyancy All Around Us Chapter 4: Same Topic, Different Experiment Science Point: Measuring the magnitude of buoyancy, the definition of fluids Experiment in the Science Lab: Archimedes' Principle Chapter 5: Using Buoyancy! Science Point: Why styrofoam floats on water Experiment in the Showdown: The Submarine Experiment Chapter 6: The Mysterious Note Science Point: Positive buoyancy, neutral buoyancy, negative buoyancy Science Experiment King Key Notes: The Force That Makes Things Float, Buoyancy Experiment Kit Guide