Hello Milena, I didn't know this Russian tongue twister. It is a good one. I don't use very often tongue twisters. It depends on the student as well. But I enjoy learning new tongue twisters. My Spanish students find it very tough to say: She sells seashells by the seashore. Unless you have problems with the sounds S and SH, it is pretty easy. Slavic ones seem much more difficult. Let me give you a Bulgarian one to try: Крал Карл и кралица Клара крали кларинети./King Carl and Queen Clara were stealing clarinets. :) Not bad, right? However, I think, though that the hardest tongue twisters are in Polish. How about this one? W Szczebrzeszynie chrząszcz brzmi w trzcinie/In Szczebrzeszyn a beetle buzzes in the reed.