In this textbook:are Many interesting, entertaining facts. They will surprise a child and will do studies unboring.are Many questions on a reflection. Answers for them are often ambiguous, as well as in life.it is Unusual presentation of educational materials. A child studies to analyse facts, but not it is simple to memorize them.it is the System serve of information. One educational themes logically pass to other, that develops the system thinking.are Quality illustrations. Illustrations are done with love, to support interest of child and save his sight.And as early as this textbook a child will find answers for questions:● What is named the second bread?● How is it possible to pound hard grain?● Does a white bear-cub can to become domestic?● For what to the different breeds of dogs different ears?● When is a day equal to night?● Why is it needed to know exact time?● That it is possible to see on the ribbon of time?● How did a fire clock work?● For what did think of penknifes?● What the real friendship?And many other.