Want to get ahead in Science, Technology, Engineering, and Maths? Get stuck in and experiment! Witness your very own erupting volcano blow sky high. Build a sturdy sandcastle and reveal the incredible technology of construction materials. Design a wind-up car and discover your inner engineer, and test your knowledge of maths by making a marble run. Great Science Projects features an enormous collection of incredible, tried-and-tested STEM experiments. It brings together in one place the very best of DK's Lab books (Home Lab, Outdoor Maker Lab, Science Lab, and Maths Lab) including making a wormery, constructing a spaghetti tower, mixing gels to make air fresheners, creating mathematically precise shadow puppets, and freezing icy orbs. With over 50 experiments of different lengths and difficulty levels, Great Science Projects is a one-stop-shop packed with exciting STEM activities to inspire every budding home scientist, technology fan, young engineer, and mathematician. All equipment needed can be found in the home or easily sourced, and simple, practical, step-by-step instructions mean that kids can work through projects in their own time. Beautiful photography and engaging illustrations are accompanied by "How it works" and "Real world" explanations to help 9+ readers understand the principles of STEM behind each and every step of an experiment. Content previously published in Science Lab, Maths Lab, Home Lab, Outdoor Activity Lab.