Do dinosaurs have bellybuttons? This intriguing question launched a journey into inquiry science that captivated a class of four-year-olds for eight months. As students enjoyed dinosaur books, examined dinosaur artifacts, drew pictures, watched videos, and generally immersed themselves in all things dinosaur, the authors built a culture of learning in their classroom that helped these young students develop science-process skills such as observation, measurement, and communication. They share their inspiring learning adventure here. (Contains 1 figure.)