The Supercomputing Wales project has as one of its goals increasing the public understanding of High-Performance Computing in Wales. To further this ambition, the RSE team at the Swansea Academy of Advanced Computing agreed to run a stand at the Swansea Science Festival 2018. To this end, we assembled a cluster of 16 Raspberry Pi single-board computers, and developed software to demonstrate some of the principles of parallel computing as well one of as the types of problem that the supercomputer in Swansea is used for in research. In this talk, we will describe the process of designing and constructing both the hardware and the software, and some of the challenges we encountered along the way, as well as discussing how well it works as a scaffold to discussions around parallel computing with members of the general public.
