Presentation before the BCN Python Meetup Group aimed at explaining how Artificial Neural Networks work, with a purely graphical approach. No math nor code is used during the presentations, only images and analogies. Gladly enough, the audience was somehow surprised they now have understand intuitively how these mathematical engines work. The objective was fully met. Besides, the presentation compares how humans learn to read (by reiteration) and computers with ANN do (no surprise: by massive reiteration).