When designing purely physical products we do not necessarily have to understand what it is about their physicality that makes them work - they simply have it. However, as we design hybrid physical/digital products we now have to understand what we lose or confuse by the added digitality - and so need to understand physicality more clearly than before. This multi-disciplinary workshop will seek to construct a fundamental understanding of the nature of physicality: how humans experience, manipulate, react and reason about 'real' physical things and how this may inform the design process and the design of future innovative products.