It is called "Foma". This mini-cantata for boys' choire on the poem by S.Michalkov was written in 2007 for my friend Sergei Shesterikov and his choire. He is the Director and Chief Choiremaster and Conductor of the choire "Sokoliata" of Rybinsk's College of Arts. This choire under his brilliant management has won numerous international competitions. And since 2007 they performed "Foma" in many countries.
recently I added a video recording of their performance in one of the competitions (I think it was in one of the Baltic States). You can see it in my video section of this website.
There is one more choire I have written back in 1990. It is called "Psalm". And it is one of the Bible's psalms in Komi language for a choire a'cappella. It has not been performed yet, so there is no record. Just so that you know.