Kosmos Detective Equipment The Three ??? Secret Code

Language: German; Children send texts with the help of a cipher disk and cipher table that are not understandable to others; Contains a decoder disk for self-assembly, cipher tables, a string for the "knot language," and a piece of chalk for "thief signs"; The instructions explain exactly how to alter texts and make them unreadable to others; Recommended age: 8 years and up; With this set, secret messages can be encoded using various encryption systems.