I think CrypTool is great software. And what I find most useful in it is visualization of algorithms such as Caesar, Vigenere, AES, DES. And my question is: does anyone know other tools which are intended for visual explanation of basic cryptography and related topics such as prime numbers, elliptic curves, finite fields, factorization etc? I am looking for short videos, games, animation, comics, presentations, popular science films. I am lecturer at University, and my goal is to awake students' interest in cryptography and convince them that it's one of the most exciting disciplines. What would you recommend me?