MouthPad^, a smart oral splint that enables hands-free human-computer interaction using tongue, jaw, head, and breathing gestures, wins the grand prize in Innovation: Early Stage Technology at Cannes Lions International Festival of Creativity. Developed by MIT Media Lab spinoff Augmental, the forthcoming machine learning-powered ‘tongue trackpad’ gives users (not just those lacking mobility) full reign over their gadgets—to send emails, edit photos, or play videogames—while being invisible to others.