Book excerpt: This is a bumper collection of 150 fantastic experiments and projects that explain a wide range of scientific facts, processes and principles. Make a working volcano, construct a reflecting telescope, create a compass, and much more. The projects are arranged thematically to reflect different areas of science and technology, such as the natural world, earth sciences, physics and transport. Budding young scientists are guaranteed hours of fascination and amusement while gaining a practical understanding about our everyday world.