The experiments and experiments presented on the pages of this book will not require special equipment and materials. With them, the whole world will become a scientific laboratory: a lawn in the garden, a garden garden in the country, and a bench in the yard. Studying the starry sky, talking with a neighbor in the country using a rope phone, listening to the "music" of the wind and researching the properties of warm snow will become available to everyone. A step-by-step description of these and other experiments, accompanied by colorful illustrations, will help a novice scientist understand how the laws of physics, chemistry and biology, which are referred to in school textbooks, work. And brief explanations will prompt answers to many questions of the young researcher.