The Challenge of Materials is an online gallery of information and graphics of common materials; the site is based on an exhibit at the Science Museum in London. It is divided into four main components. World Changers features materials which have significantly impacted civilization. What are Materials features nine atomic structures of materials and a matching game, complete with snippets of information about each material. Selecting Materials allows users to guess which materials work best for certain applications. Making Materials explains three different methods used to transform a raw material into a usable product.