We went with Daniel to the fountain for water. With us connected Sanek, Danilkin friend years so 10-11. Let’s go, Daniela bucht: "why do you need to pull water, here’s the excellent water under the crane". I begin to explain the harm of calcium carbonate. I have been teaching chemistry for a year.
“Daniel,” I insidiously asked, “What is carbonate?
The whirls screamed loudly, Daniel stumbled and silenced. After three minutes of silence, Sanek said:
“Carbonate,” he instinctively said, “Daniel, this is such a sausage!