How do you measure something as big as the sea? Or as tiny as a grain of sand? In this delightful and mind-expanding picture book, children will discover the curious and clever world of Archimedes, the ancient Greek thinker who dared to ask the biggest questions. When young Archimedes starts to wonder how many grains of sand could fill the universe-or how heavy a crown really is-he doesn't just guess... he measures the impossible! Follow Archimedes through sun-soaked Syracuse as he dives into problems no one thought could be solved. With simple explanations, gentle humor, and vibrant illustrations, this story introduces big ideas like volume, density, estimation, and mathematical wonder-in a way young readers can understand and enjoy. Perfect for curious kids ages 6-10 who love STEM, history, or asking "why?", this book celebrates the power of imagination and the joy of thinking big. Includes a kid-friendly explanation of Archimedes' most famous discoveries and a short note for grownups about how to encourage mathematical thinking at home.