Rotakey originates in the principles of the game from the 70s of the last century called rotadraw, which is a set of circles with holes, progressively drawing which, a graphic image is obtained. One circle is one image (you will find this game by request of rotadraw). The process of such drawing looks very sticky, the disk rotates like a safe disk, and in the end an extremely simple image is obtained - too simple magic)) Kirill showed me this process, after which we spent several hours in a dialogue about why it's so sticky and what potential lurks in circles (Kirill, thank you again, and let's not lose touch). Plus, by that time I already had some desire to make a toy about encryption - so it apparently came together!
Three discs with a diameter of 20 cm, made of plexiglass. Each one has special symbols - uppercase Latin and small letters, numbers and special symbols. Instructions in 4 lessons that teach encryption and decryption - the first three lessons will allow you to recreate the story in its graphical representation, and the last lesson - a super game - crowns the learning process and contains a surprise.
Having played enough, a person gets the necessary skills to easily encrypt some messages and, importantly, passwords that are difficult to remember! After all, how nice it is to have a light abstraction on the wall in a frame and understand that the password is always in sight and at the same time so far from someone else's understanding!