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. Find out how things work: energy, wind, nature, ships, cars, cameras and computers. Fly your very own hot-air balloon, run an ant colony, build a water pump, and tell the age of ancient trees. Step-by-step photographs and easy-to-follow practical instructions ensure success in all the experiments. Fun science ideas that you can do at home or school, using materials and equipment that are easy to find or inexpensive to buy. Only simple items and objects located around the house are required for the experiments.