This title contains 160 tried and tested experiments, some classic with up-to-the minute variations, and some entirely new. The book is divided into four sections: "Forces and Motion"; "Matter and "Materials", Sound and Light"; and "Electricity and Magnets". Scientific principles are shown in action as well as in photographs of their everyday applications. The experiments are all safe to do, use household materials, are manageable but absorbing, and offer rewarding results. Readers are told how long each experiment lasts, what materials are needed, and what the results mean.