ReacTickles Magic is one of our most successful and established projects that has grown in harmony with developments in sensor-based interaction and open source programming. The core ethos of ReacTickles Magic is to provide users with a continuous positive feedback loop, so that they easily gain a sense of control and mastery. The software is designed to mirror bodily input through touch, sound and motion. The simple iconic interface encourages a variety of gestural and manipulative inputs, for example repetition, rhythm and pressure, shaking, pressing, tapping, smoothing, dragging, circling. With the addition of sound, an infinite variety of vocalisations can make a direct impression on the graphical output.