FROM SHERLOCK HOLMES RECORDS: SYMPATHETIC INK

The entertaining chemical experiment is an effective way to increase pupils' interest in chemistry; it helps to study and realize the subject, and to learn the material more deeply. The entertaining experiment may be successfully used during the lesson and after it as part of different activities – conferences, disputes, etc. Besides, this experiment is limited by few well-known and safe school laboratory experiences. The article presents a detailed description of the entertaining cryptography experiment and corresponding methodical recommendations.