Cocoon is our vision of a programmable dream machine from the future. This device would be enabled by the synthesis of many devices under development at MIT Media Lab’s Fluid Interfaces Group. As a dreamer descends into sleep, Cocoon tracks three sleep-stages using brain activity, muscle tension, heart rate, and movement data that are revealed through its dome. External stimuli in the form of scent, audio, and muscle stimulation direct the content of the dreams. Crossing boundaries both disciplinary and experiential, Cocoon offers an embodied investigation of one’s own consciousness, a philosophy in the flesh; with it users can observe and engage the torsion of their senses, see and shape dreams which are otherwise entirely uncontrollable, unlinked, and unseen. We hope this speculative vision, and the conversations it inspires, help us reflect on how we develop our existing dream engineering technologies going forward, and how we combine them.