'Puja Varsani is a product designer with a fascinating passion for social robotics. These are robots that help people and in the future they may have a role anywhere from the home to the NHS. Puja explains that they may be a companion or even do the washing up and cleaning. The designer shows us how she comes up with her ideas and reveals some of the tricks of the trade before a display of her robots is unveiled to a curious audience at an exhibition.' BBC Spark