Solve a Little Design 'Fault'
Common Vessels by Studio Desinere are the perfect example of user-involved design. Each item in the user-centric furniture series was created with a fundamental void - a wonky leg, for example. This forces the person to use their own ingenuity in order to give the piece of furniture second life, by using a book, pot plant or the like to stabilise it. See more user-involved design here.