Children always ask questions "why," "where," "how," "why..." German scientists came to the aid of adults and opened a real university for children in the city of Tübingen, where the most inquisitive can get answers to any difficult questions. Classes are taught by teachers at the University of Tübingen, one of the oldest and most respected educational institutions in Germany. In order for as many children as possible to know what modern science is studying, scientists have published their lectures in book form. Seriously, but not at all boring, they answer the most frequently asked questions at Children's University. In this issue, the authors of the book, German journalists - popularizers of science Ulla Steuernagel and Ulrich Janssen, with the participation of professors from the University of Tübingen, will tell, why did medieval knights build castles, where lightning and thunder come from, why boys and girls behave differently, like bats see with their ears, why mathematicians can't count, why people tell each other stories and how athletes manage to improve records all the time.