This document discusses prototyping in government. It introduces Policy Lab as a space where government policy teams can develop skills to make policy in a more open, digital, and user-centered way. Various techniques for prototyping are mentioned, such as workshops, roadmapping, co-design challenges, and modeling. Examples of past prototypes developed include ones related to the Food Standards Agency, policing, and improving general practitioner services. The document promotes further exploring session ideas and provides links to learn more about Policy Lab UK.