There are editions above that time is not imperious. To them, no doubt, it is possible to take labours of remarkable soviet mathematician, physicist and teacher Yakov Исидоровича Перельмана. Books, where he popularizes exact sciences, on an extent here already many decades remain unchanging interesting and enthralling for a reader. A scientist possessed surprizing talent to pass the most difficult conformities to law through simple and clear examples, to find practical application to the abstract concepts, to convert the dry language of science into a living, vivid and accessible narration it is impossible to unstuck from that!For a reader that gets on the hip this book, there is possibility to become familiar at once with a few books of Я. И. Перельмана, that was published at different times and suffered a not alone release. In the collection complemented by illustrations and schematic pictures, I am quite a bit worth-while experiments and tasks from an area physics, mathematics, geometry and other scientific entertainments that it is possible to take up in own time.