At BBC Research and Development, part of our job is to think about and demonstrate what radio might be like in the future. To do this effectively, we need to be able to quickly and cheaply show how our ideas would work on physical radio sets, because this is still how the majority of people listen. This talk is about techniques we've developed to do this, from helping people to describe what they want from a radio, to filtering out bad ideas ("cat wigs"), to prototyping experiences on physical devices using a Raspberry Pi and web technologies.