Oversized knobs add a whimsical touch to the kitchen, where a pendant designed by Johanna Grawunder—who worked with Sottsass in Milan—hangs over the circular island. White Viking appliances are integrated with the cabinetry.  Photo 3 of 12 in IDEO Founder David Kelley Asks $13.5M For His Ettore Sottsass-Designed Masterpiece