Designers have dreamed about creating a refreshable, affordable full-page Braille display for the visually impaired, and a team at the University of Michigan has found an ingenious solution in bubbles. That’s right, bubbles

Artist and TED Fellow Christine Sun Kim, deaf since birth, talks with Daniel Kish, who lost his sight to cancer aged 13 months, about sound and sound “etiquette.”

Daniel Kish has been blind since he was 13 months old. He navigates the world using echolocation, sending out flashes of sound that bounce off objects and back to let him construct an understanding of the space around him. He let Kate Torgovnick May tag along as he got ready for TED.