In 2008, the Centre for Science Education at Sheffield Hallam University teamed up with VT Enterprise (now Babcock International) in their submission of a successful bid to deliver the national STEM (Science, Technology, Engineering and Maths) Subject Choice and Careers Project. An integral part of the bid was the promotion of equality and diversity throughout the project, with a specific intention to produce an equality and diversity "toolkit". The aim of the toolkit was to assist anyone involved in the creation of STEM careers resources for young people. Understanding of the intersectionality of different strands of equality is now recognised as an important aspect of how disadvantage can be experienced by individuals and the author wanted to try and incorporate this within the toolkit. In this article, the author discusses the process of developing the toolkit, its content and the challenges faced at every stage of the project.