The ATLAS Collaboration at CERN has developed a wide array of resources to support informal education for all ages. From colouring books and activity sheets for children, to fact sheets and cheat sheets for more advanced learners, ATLAS Outreach provides a collection of printable resources that can be used to learn more about particle physics and the ATLAS experiment at the LHC. In particular, ATLAS recently released an updated version of one of its colouring books, with brand-new illustrations and a focus on detector upgrades for the HL-LHC. All these resources can be used in diverse contexts: at home, in classrooms, at science festivals and outreach events, and more. To ensure global accessibility, the resources are translated into multiple languages. This contribution highlights the most recent content additions, and the collaborative workflow behind these resources, from topic identification and design, to review and translation.