Which of the guys would not want to acquire that wonderful machine, similar to an old-fashioned watch, the lucky owner of which was a student of the 6th “B” class of the 151st Minsk school Genk Diogenov! With its help, you can be transported to the distant past of our planet and lift the curtain on the future. You will say that there cannot be such a machine as there is no school number 151 in Minsk. Perhaps this is true. And yet, in the adventures of Genki Diogenov, told by the young writer Y. Vilkin, you will find a lot of interesting and instructive things. Published from the publication “The Extraordinary Adventures of Gennady Diogenov”, Minsk, State Publishing House of the BSSR, 1963.