BIT BY BIT is an encryption game that is designed to improve students' understanding of natural language processing in computers. Participants encode clear words into binary code using an encryption key and exchange them in the game. BIT BY BIT enables participants who do not understand the concept of binary numbers to perform the process of converting decimal into binary and vice versa. This understanding helps participants to comprehend one of the concepts of computer science (i.e., how computers express natural languages using signals). (Contains 4 figures.)