Recent developments in science education policy and practice suggest that successful learning in the 21st century requires the horizontal connectedness across areas of knowledge by linking the arts and humanities with science, technology, engineering and mathematics (STEM) subjects. The rapidly increasing STEAM movement calls for arts integration into science teaching and learning to help school students develop skills that are necessary to thrive in an innovation economy. Education and outreach in high-energy physics are not an exception to these developments. This paper outlines a series of learning activities for students at secondary and tertiary level that use a cross-disciplinary approach to fostering creativity and imagination in physics education and outreach.