What does a bulldozer do? How do airplanes fly? Which body organ is the heaviest? Where can you find pyramids? What is a volcano? How do plants grow? Which animals live where? How does a rainbow form? How fast can a cheetah run? Who was the first to land on the moon? This encyclopedia provides exciting and easily understandable answers to countless simple and trickier questions from curious children. It is a well-founded reference work that invites browsing and wonder, serving as a companion for many years. Numerous illustrations by Eric Carle, along with photos and images, make the knowledge accessible even for younger fans of caterpillars.